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Application of neutron imaging in observing various states of matter inside lithium batteries

National science Review 2023年第11期10卷 192-208页

作者： Lei Gao Songbai Han Haijin Ni Jinlong Zhu Liping Wang Song Gao Yonggang Wang Dubin Huang Yusheng Zhao Ruqiang Zou School of Materials Science and Engineering Peking University Academy for Advanced Interdisciplinary Studies Southern University of Science and Technology Department of Physics Southern University of Science and Technology Eastern Institute for Advanced Study

Lithium batteries have been essential technologies and become an integral part of our daily lives, powering a range of devices from phones to electric vehicles. To fully understand and optimize the performance of lithium batteries, it is necessary to investigate their internal states and processes through various characterization methods. Neutron imaging has been an indispensable complementary characterization technique to X-ray imaging or electron microscopy because of the unique interaction principle between neutrons and matter. It provides particular insights into the various states of matter inside lithium batteries,including the Li+concentration in solid electrodes, the Li plating/stripping behavior of Li-metal anodes,the Li+diffusion in solid ionic conductors, the distribution of liquid electrolytes and the generation of *** review aims to highlight the capabilities and advantages of neutron imaging in characterizing lithium batteries, as well as its current state of application in this field. Additionally, we discuss the potential of neutron imaging to contribute to the ongoing development of advanced batteries through its ability to visualize internal evolution.

关键词： lithium battery neutron imaging electrodes electrolytes

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Editorial for the theme issue “Multiscale Crystallites for High Performance Energy Storage”

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Materials Reports(Energy) 2025年第1期5卷 1-2页

作者： Dongfeng Xue Shenzhen Institute for Advanced Study University of Electronic Science and Technology of ChinaShenzhen518110PR China

In 1959,the talk of Richard ***“There's plenty of room at the bottom”inspired us to explore the very,very small world where a lot of new things would happen that represent completely new designing *** on a small scale behave like nothing on a large scale,for they satisfy the laws of quantum *** we go down and fiddle around with the atoms there,we work with different laws,which enables us to realize different tasks and manufacture in different ways.

关键词： plenty satisfy nothing

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PVA-regulated construction of 3D rGO-hosted Na_(3)V_(2)(PO_(4))_(2)F_(3) for fast and stable sodium storage

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Journal of Energy Chemistry 2024年第12期99卷 100-109页

作者： Shilong Xu Ying Zhu Xinyan Li Yamei Wang Dong Yan Xiaobin Niu Jingxia Jiang Rui Wu Jun Song Chen School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 610054SichuanChina Medical and Pharmaceutical College Chongqing 401331China Institute for Advanced Study Chengdu UniversityChengdu 610054SichuanChina Shenzhen Institute for Advanced Study University of Electronic Science and Technology of ChinaShenzhen 518000GuangdongChin

Na_(3)V_(2)(PO_(4))_(2)F_(3)(NVPF) is shown to be an attractive cathode material for sodium storage due to its high theoretical capacity and suitable working ***,its low electronic conductivity and poor cycling stability have to be addressed in order for enhanced high-rate performance and cycle ***,we have prepared a 3D reduced graphene oxide (rGO) host-supported NVPF *** discover that polyvinyl alcohol (PVA) serves as an important structural directing agent that bridges between NVPF and rGO through the hydrogen bonding,and thus regulates the formation of the 3D r GO framework with NVPF nanocuboids embedded inside (NVPF@C@rGO).With such a unique construction,NVPF@C@rGO exhibits excellent cycling stability and rate performance for sodium storage,showing high reversible capacities of 121 m Ah/g and 113 mAh/g at 1C and 10C,respectively,and 103 mAh/g after 700cycles at 50C with 98.3%*** at an extremely high current of 100C,it also delivers a reversible capacity of 64 mAh/g,surpassing the performance of many recently reported NVPF-based *** voltammetry (CV) and galvanostatic intermittent titration technique (GITT) data confirm the much better kinetic properties of NVPF@C@rGO electrode than the control samples of NVPF@rGO and pure ***-situ XRD results reveal that the 3D rGO housing can effectively suppress the lattice variation of NVPF,with a maximum volume change of only 1.84%during ***,the in-situ temperature sensing reveals the more stable working temperature of NVPF@C@rGO compared to phase-pure NVPF,suggesting a higher temperature safety of the *** NVPF@C@rGO as the positive electrode and commercial hard carbon as the negative electrode,a sodium-ion full battery has been assembled with about 110 m Ah/g at 1C for 300 cycles,corresponding to an energy density of 291 Wh kg^(-1).The construction of 3D r GO housing as a conductive support offers an effective strategy for high-rate,long cyc

关键词： Sodium-ion battery Polyanionic compound Reduced graphene oxide 3D carbon layers Na_(3)V_(2)(PO_(4))_(2)F_(3)

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On Time-Aware Cross-Blockchain Data Migration

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Tsinghua science and technology 2024年第6期29卷 1810-1820页

作者： Mengqiu Zhang Qiang Qu Li Ning Jianping Fan Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 518000China University of Chinese Academy of Sciences Beijing 100000China Shenzhen Institute for Advanced Study University of Electronic Science and Technology of ChinaShenzhen 518000China

With the widespread adoption of blockchain applications, the imperative for seamless data migration among decentralized applications has intensified. This necessity arises from various factors, including the depletion of blockchain disk space, transitions between blockchain systems, and specific requirements such as temporal data analysis. To meet these challenges and ensure the sustained functionality of applications, it is imperative to conduct time-aware cross-blockchain data migration. This process is designed to facilitate the smooth iteration of decentralized applications and the construction of a temporal index for historical data, all while preserving the integrity of the original data. In various application scenarios, this migration task may encompass the transfer of data between multiple blockchains, involving movements from one chain to another, from one chain to several chains, or from multiple chains to a single chain. However, the success of data migration hinges on the careful consideration of factors such as the reliability of the data source, data consistency, and migration efficiency. This paper introduces a time-aware cross-blockchain data migration approach tailored to accommodate diverse application scenarios, including migration between multiple chains. The proposed solution integrates a collective mechanism for controlling, executing, and storing procedures to address the complexities of data migration, incorporating elements such as transaction classification and matching. Extensive experiments have been conducted to validate the efficacy of the proposed approach.

关键词： blockchain data migration cross-blockchain time-aware multi-chain decentralized applications

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High-efficiency exudates drainage of anti-adhesion dressings for chronic wound

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Chinese Chemical Letters 2025年第4期36卷 588-593页

作者： Bingyang Lu Dehui Wang Junchang Guo Yang Shen Qian Feng Jinlong Yang Xiao Han Huali Yu Luohuizi Li Jiaxin Liu Jing Luo Huan Liu Zhongwei Zhang Xu Deng Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Department of Critical Care Medicine West China Hospital of Sichuan University Shenzhen Institute for Advanced Study University of Electronic Science and Technology of China

Secondary trauma, resulting in undesirable injury and bleeding during wound dressing treatment, which will cause the treatment of chronic wounds ineffective. The medical cotton gauzes often bring strong adhesion due to the exudates absorbed and clots formed. Conversely, the easily detachable wound dressings neglect the wound seepage management, rendering them ineffective in facing the complexities of chronic wounds. To address this challenge, we propose a novel draining anti-adhesion dressings(DAD) by constructing the hydrophilic microchannels array on the superhydrophobic dressing. The superhydrophobic areas facilitate stable wound fiuid repellence leading to achieve the anti-adhesion(18.7% detachment energy of cotton) and the microchannel array ensures the transportation of excess exudates(>92%) by the capillary force. Notably, our dressing demonstrates a significant healing-promoting in a chronic wound model in rats. The development of such dressings holds promise for advancing wound care practices and addressing the unique challenges posed by chronic wounds, offering a valuable solution for improved clinical outcomes.

关键词： Anti-adhesion and secondary trauma prevention Biological fluids repelled Chronic wound healing treatment Exudates transport Superhydrophobic-hydrophilic

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Enhanced micropollutant degradation over catalyst-free synergistic activation of periodate and persulfate under solar light

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Environmental science and Pollution Research 2025年 1-14页

作者： Zheng, Zexiao Man, Justin H. K. Wang, Xiaoying Kwan, Alvin S. K. Yim, Kwan To Lo, Irene M. C. Department of Civil and Environmental Engineering The Hong Kong University of Science and Technology Hong Kong Institute for Advanced Study The Hong Kong University of Science and Technology Hong Kong

Micropollutants are ubiquitous in water sources, posing threats to both human health and ecosystems. Conventional water and wastewater treatment processes are inefficient in micropollutant removal. In this study, the energy-effective and environmentally friendly solar light–driven periodate (PI) and peroxydisulfate (PDS) synergistic activation process (PI/PDS/solar light) is developed for efficient micropollutant decontamination. The PI/PDS/solar light process (0.5 mM PI and 0.25 mM PDS) achieves 100% degradation of 2 ppm CBZ in 15 min with a CBZ degradation rate constant of 0.31 min−1, which is 6.6 and 13.2 times that of PI/solar light (0.046 min−1, 0.5 mM PI) and PDS/solar light (0.023 min−1, 0.5 mM PDS). Mechanistic studies reveal that the enhanced solar light utilization and charge transfer between PI and PDS lead to the synergistic activation of the dual oxidants in the PI/PDS/solar light process, thus promoting micropollutant degradation. Additionally, the scavenging tests demonstrate that •OH and SO4•− are the dominant radicals for CBZ degradation. Furthermore, the PI/PDS/solar light process exhibits excellent applicability in different types of water sources, where several water components (pH, natural organic matter, and anions) pose insignificant impacts on CBZ degradation. Nonetheless, the developed process still has a disadvantage in that the degradation intermediates of PPCPs may bring potential toxicity. The study offers valuable mechanistic insights into the novel synergistic PI and PDS coactivation process under solar light and highlights the practicability of the developed technique as an efficient strategy for micropollutant decontamination. © The Author(s) 2025.

关键词： Decontamination

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Dark solitons on elliptic function background for the defocusing Hirota equation

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Communications in Theoretical Physics 2025年第3期77卷 21-36页

作者： Xin Wang Jingsong He School of Mathematics and Information Science Zhongyuan University of TechnologyZhengzhou450007China Institute for Advanced Study Shenzhen UniversityShenzhen518060GuangdongChina

We investigate dark solitons lying on elliptic function background in the defocusing Hirota equation with third-order dispersion and self-steepening *** means of the modified squared wavefunction method,we obtain the Jacobi's elliptic solution of the defocusing Hirota equation,and solve the related linear matrix eigenvalue problem on elliptic function *** elliptic N-dark soliton solution in terms of theta functions is constructed by the Darboux transformation and limit *** asymptotic dynamical behaviors for the elliptic N-dark soliton solution as t→±∞are *** numerical plots of the elliptic one-,two-and three-dark solitons,the amplification effect on the velocity of elliptic dark solitons,and the compression effect on the soliton spatiotemporal distributions produced by the third-order dispersion and self-steepening terms are discussed.

关键词： darboux transformation dark soliton elliptic functions theta functions defocusing hirota equation

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An Array-based Photolithographically Patterned Electrochemical Sensing Platform for Highly Sensitive Determination of Uric Acid,Dopamine,L-Tryptophan,and Pyridoxine in Biological Samples

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Journal of Analysis and Testing 2024年第4期8卷 505-517页

作者： Ankit Kumar Singh Shreanshi Agrahari Shivani Shukla Ida Tiwari Muhammad Ahmad S.Ravi P.Silva Department of Chemistry(Centre of Advanced Study) Institute of ScienceBanaras Hindu UniversityVaranasi221005India Advanced Technology Institute University of SurreyGuildfordSurreyGU27XHUK

Biomolecules play important roles in physiological functions and pharmacological characteristics of human *** acid(UA)is the end product of ***(DA)is a neurotransmitter of catecholamine group.L-tryptophan is an essential amino acid that can be metabolized to neuroactive *** is a water-soluble vitamin playing an important role in nervous *** abnormalities in their concentration levels led to a wide range of signifi cant mental and physical ***,electrochemical analysis of these analytes on an array system would be benefi cial from clinical or scientifi c points of *** work was aimed at the development of practical sensor array for determination of multiple analytes on a single sensing platform using individually addressable *** occurrence of adsorption–desorption phenomenon on the surface of palladium microelectrode array(Pd MEA)printed on the silicon wafer through photolithography was exploited for electro-oxidation of UA,DA,L-tryptophan and *** sensing of electroactive UA was done using carbon nanotubes(CNTs)grown Pd MEA as a working electrode,while selectivity for other analytes was achieved by the modifi cation of CNTs/Pd MEA through electrodeposition of poly(L-lysine)(poly(L-lysine)/CNTs/Pd MEA)for DA sensing,poly(L-arginine)(poly(L-arginine)/CNTs/Pd MEA)for L-tryptophan sensing and reduced graphene oxide(rGO/CNTs/Pd MEA)for pyridoxine *** electrochemical diff erential pulse voltammetry(DPV)analyses reveal excellent linearity in the concentration ranges of 50–6000μmol/L,2–8000μmol/L,20–15,000μmol/L,and 10–5000μmol/L with detection limits of 15.0,0.5,10.0,and 1.0μmol/L for UA,DA,L-tryptophan,and pyridoxine,*** proposed multiple analytes sensor has shown very high sensitivities of 140,9580,2280,and 940μA·(μmol·L^(-1))^(-1)·cm^(-2)for UA,DA,L-tryptophan,and pyridoxine sensing,***,accuracy and reliability of the fabricated sensor were also test

关键词： Microelectrode arrays Multianalyte sensor Carbon nanotubes Uric acid Dopamine L-Tryptophan Pyridoxine

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HM-ORAM: A Lightweight Crash-consistent ORAM Framework on Hybrid Memory System

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ACM Transactions on Storage 2025年第2期21卷 1-28页

作者： Liu, Gang Xiao, Zheng Li, Kenli Wang, Rujia Shenzhen Institute for Advanced Study University of Electronic Science and Technology of China Shenzhen China College of Information Science and Engineering Hunan University Changsha China Illinois Institute of Technology Chicago United States

Byte-addressable non-volatile memory (NVM) is a promising alternative technology for main memory, allowing the processor to access persistent data in the main memory directly. Systems with emerging NVM as the main memory still suffer from information leakage, performance, and endurance challenges. Fortunately, Oblivious RAM (ORAM) provides provable secure address obfuscation and encryption and can be used to build a secure memory system. However, it is challenging to support crash consistency with the increasing use of NVM as persistent memory. Current state-of-the-art PS-ORAM systems are designed based on pure NVM memory systems, which suffer from low performance. Different from the previous PS-ORAM system, in this work, we consider a hybrid memory system (both NVM and DRAM) and aim to build a crash-consistent ORAM framework with low overhead. We propose the HM-ORAM framework, which includes a novel ORAM tree-level partition scheme, a lightweight data persistency architecture, and a secure access protocol. It takes full advantage of both hybrid memory technologies to achieve the design requirements to support crash consistency and persistence of ORAM systems with minimal write overhead. Without compromising security, HM-ORAM can outperform an NVM-based ORAM (i.e., NVM-ORAM) system by 1.23× and 1.39× in non-recursive and recursive implementations. © 2025 Copyright held by the owner/author(s).

关键词： Information leakage

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Exploring superionic conduction in lithium oxyhalide solid electrolytes considering composition and structural factors

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npj Computational Materials 2024年第1期10卷 1705-1717页

作者： Fiaz Hussain Jinlong Zhu Yusheng Zhao Wei Xia Ningbo Key Laboratory of All-Solid-State Battery Eastern Institute for Advanced StudyEastern Institute of TechnologyNingboZhejiang315201China Department of Physics Southern University of Science and TechnologyShenzhen518055China

Lithium(Li)oxyhalides have emerged as promising solid electrolyte candidates for all-solid-state batteries(ASSBs)due to their superior ionic conductivity and excellent cathode ***,the mechanism of Li transport in oxyhalides has remained unclear due to the complex nature of these compounds,which often comprise multiple phases such as crystalline and amorphous structures.

关键词： conduction lithium solid

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