检索结果-内蒙古大学图书馆

A Surface-Strained and Geometry-Tailored Nanoreactor that Promotes Ammonia Electrosynthesis

Advanced materials 2020年第50期132卷 22799-22805页

作者： Li, Panpan Jin, Zhaoyu Fang, Zhiwei Yu, Guihua Materials Science and Engineering Program and Department of Mechanical Engineering The University of Texas at Austin AustinTX78712 United States Center for Electrochemistry Department of Chemistry The University of Texas at Austin AustinTX78712 United States

A surface-strained and geometry-optimized TiO2 nanoreactor enhances the performance of electrocatalytic nitrogen fixation. The nanotubular confinement allows spatial regulation of the mass transport of nitrogen during the NRR process and offers an enlarged surface area, thus boosting the ammonia production with high selectivity. Both experimental and theoretical evidence support strained Ti3+ sites, demon- strating a more favorable pathway for the N2 activation and selective NH3 production with a faster kinetic rate than the pristine TiO2. The TiO2-based nanoreactor with surface and bulk structure tailoring delivered an NH3 yield rate up to 5.50 μgh-1cm-2 (16.67 μgh-1 mgcat-1) and high faradaic effi- ciency of 26 % under ambient aqueous conditions Our findings highlight the concept of lattice strain and geometry modified nanoreactors, which will have broad implications in the renewable energy catalysis and electrosynthesis of valuable products. © 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

关键词： Nitrogen fixation

来源：评论

学校读者我要写书评

暂无评论

A perspective on the Li-ion battery

引用

science China Chemistry 2019年第12期62卷 1555-1556页

作者： John B.Goodenough Hongcai Gao Texas Materials Institute and Materials Science Program The University of Texas at Austin Cockrell School of Engineering

In the 1960s,Rouxel in France and Robert Schroeder in Germany explored the chemistry of reversible intercalation of Li^+between MS2(M=transition metal)layers held together by weak Van der Waals bonding[1].In 1967,Kummer and Webber of the Ford Motor *** discovered fast 2D Na+diffusion at 300℃in incompletely occupied Na^+and O layers between spinel blocks of an aluminum oxide and had invented a sodium-sulfur battery operating above 300℃.

关键词： battery incomplete occupied

来源：评论

学校读者我要写书评

暂无评论

Halide Double Perovskite-Based Efficient Mechanical Energy Harvester and Storage Devices for Self-Charging Power Unit

SSRN

引用

SSRN 2022年

作者： Yoon, Soon-Gil Ippili, Swathi Kim, Jong Heon Jella, Venkatraju Behera, Subhashree Vuong, Van-Hoang Jung, Jang-Su Cho, Yujang Ahn, Jaewan Kim, Il-Doo Chang, Yun Hee Kim, Hyun-Suk Department of Materials Science and Engineering Chungnam National University 99 Daehak-ro Yuseong-gu Daejeon34134 Korea Republic of Texas Materials Institute and Materials Science and Engineering Program The University of Texas AustinTX78712 United States 291 Daehak-ro Yuseong-gu Daejeon34141 Korea Republic of

With the rapid development of portable/wearable electronic devices, high-efficient and sustainable self-powered systems have considerably risen in demand to support their off-grid operation. Recently, metal halide perovskites (MHPs) have been suggested as promising materials for energy harvesting and storage devices because of their excellent optoelectronic, ferro/piezoelectric, and ion migration properties. However, the high toxicity and poor physicochemical stability of MHPs obstruct their practical application. Herein, for the first time, the potential of methylammonium tin halide (MA2SnX6;X = Cl, Br, and I) double perovskite thin films for high-efficient self-charging power units (SPUs) is elucidated by virtue of their high stability in air. To this end, the integration of a MA2SnCl6-based piezoelectric nanogenerator (PENG) with a lithium metal battery (LMB) which also uses the MA2SnCl6-based thin film as the cathode is demonstrated. The MA2SnCl6-based PENG exhibited a high output power density of 7.33 μW cm-2 and an excellent mechanical durability. Further, the MA2SnCl6 as a cathode in LMB recorded the highest specific capacity of 589.98 mAh g-1. Moreover, 1 nm-thick Al2O3 coating on the MA2SnCl6 surface improved the capacity retention from 16.9% to 75.1% for 100 cycles, indicating its stable performance. Further, the MA2SnCl6-based LMB is charged by the MA2SnCl6-based PENG and utilized as SPU for operating various small-scale electronics (humidity meter, calculator, and LED). This work, not only demonstrates the immediate feasibility of MHPs toward high-capacity batteries and energy harvesters, but also provides an insight into the general design principles of MHP-based devices. © 2022, The Authors. All rights reserved.

关键词： Cathodes

来源：评论

学校读者我要写书评

暂无评论

Deciphering the Impact of Polysulfide Solvation Structure on Electrical Double Layer Chemistry in Sodium–Sulfur Batteries

引用

Angewandte Chemie 2025年

作者： Weiqi Yao Min-Hao Pai Arumugam Manthiram Materials Science and Engineering Program & Walker Department of Mechanical Engineering The University of Texas at Austin Austin Texas 78712 USA

Room-temperature sodium–sulfur (RT Na–S) batteries are garnering attention for large-scale energy storage. However, their practical application is hindered by challenges, such as the shuttle effect of sodium polysulfides (NaPS) and dendrite growth. The high solubility of NaPS in the electrolyte is particularly problematic. It disrupts electron transfer and obstructs mass transport in the electrical double layer (EDL) region. The EDL plays a pivotal role in governing the interfacial chemistry between the electrode and electrolyte, significantly impacting the overall electrochemical performance. Through simulations and experimental screening of various solvents, including 1,2-dimethoxyethane (DME), tetrahydrofuran (THF), and tetrahydropyran (THP), along with ethyl 1,1,2,2-tetrafluoroethyl ether (ETFE) as a diluent, the relationship between NaPS solvation structure and EDL chemistry has been elucidated. Our findings reveal that THP-based localized high-concentration electrolyte (LHCE) not only reduces the solubility of NaPS by altering its solvation structure but also promotes the formation of a stable inorganic solid-electrolyte interphase (SEI) and improves compatibility with sodium metal. Consequently, Na–S batteries with LHCE-THP/ETFE exhibit long-term stability over 500 cycles at 1C rate with a capacity decay rate of only 0.07% per cycle. This study provides a methodology for designing electrolytes based on molecular structure, polysulfide solvation properties, and EDL interfacial chemistry.

关键词： Electrical double layer Electrolytes Polysulfide solvation structure Shuttle effect Sodium–sulfur batteries

来源：评论

学校读者我要写书评

暂无评论

Opto-thermoelectric pulling of light-absorbing particles

引用

Light(science & Applications) 2020年第1期9卷 1686-1696页

作者： Linhan Lin Pavana Siddhartha Kollipara Abhay Kotnala Taizhi Jiang Yaoran Liu Xiaolei Peng Brian A.Korgel Yuebing Zheng Walker Department of Mechanical Engineering The University of Texas at AustinAustinTX 78712USA Materials Science&Engineering Program and Texas Materials Institute The University of Texas at AustinAustinTX 78712USA State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision InstrumentTsinghua UniversityBeijing 100084People’s Republic of China McKetta Department of Chemical Engineering The University of Texas at AustinAustinTX 78712USA Department of Electrical and Computer Engineering The University of Texas at AustinAustinTX 78712USA

Optomechanics arises from the photon momentum and its exchange with low-dimensional *** is well known that optical radiation exerts pressure on objects,pushing them along the light ***,optical pulling of an object against the light path is still a counter-intuitive ***,we present a general concept of optical pulling-opto-thermoelectric pulling(OTEP)—where the optical heating of a light-absorbing particle using a simple plane wave can pull the particle itself against the light *** irradiation orientation-directed pulling force imparts self-restoring behaviour to the particles,and three-dimensional(3D)trapping of single particles is achieved at an extremely low optical intensity of 10^(−2)mWμm^(−2).Moreover,the OTEP force can overcome the short trapping range of conventional optical tweezers and optically drive the particle flow up to a macroscopic *** concept of selfinduced opto-thermomechanical coupling is paving the way towards freeform optofluidic technology and lab-on-achip devices.

关键词： absorbing light trapping

来源：评论

学校读者我要写书评

暂无评论

Gradient Design with Low-Tortuosity Overcoming Kinetic Limitations in High-Loading Solid-State Cathodes

引用

Angewandte Chemie 2025年

作者： Guangzeng Cheng Jinping Yu Yonghui Wang Zhengyu Ju Yue Zhu Weiqian Tian Jingwei Chen Huanlei Wang Jingyi Wu Guihua Yu School of Materials Science and Engineering Ocean University of China Qingdao 266404 China Materials Science and Engineering Program and Walker Department of Mechanical Engineering The University of Texas at Austin Austin Texas 78712 USA

The extensive commercialization of practical solid-state batteries (SSBs) necessitates the development of high-loading solid-state cathodes with fast charging capability. However, electrochemical kinetics are severely delayed in thick cathodes due to tortuous ion transport pathways and slow solid-solid ion diffusion, which limit the achievable capacity of SSBs at high current densities. In this work, we propose a conductivity gradient cathode with low-tortuosity to enable facile ion transport and counterbalance ion concentration gradient, thereby overcoming the kinetic limitations and achieving fast charging capabilities in thick cathodes. The LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathodes deliver a room-temperature (RT) capacities of 147 and 110 mAh g −1 at 5 C and 10 C, respectively, and meanwhile achieve a RT areal capacity of 3.3 mAh cm −2 at 3 C, enabling SSBs simultaneously high energy and power densities. The universality of this strategy is demonstrated in LiFePO 4 cathodes, providing a novel solution for fast charging and large-scale application of high-loading SSBs.

关键词： solid-state battery composite cathode high-loading gradient low-tortuosity

来源：评论

学校读者我要写书评

暂无评论

First-Principles Assessment of Chemical Lithiation of Sulfide Electrolytes and its Impact on Their Transport, Electronic and Mechanical Properties

SSRN

引用

SSRN 2022年

作者： Hao, Wei Lee, Myungsuk Hwang, Gyeong S. Materials Science and Engineering Program The University of Texas at Austin AustinTX78712 United States McKetta Department of Chemical Engineering The University of Texas at Austin AustinTX78712 United States SK Innovation Korea Republic of

Sulfide-based solid electrolytes (SEs) have received considerable attention, but their practical application is hindered by the lack of chemical stability. When in contact with Li metal, sulfide SEs may undergo decomposition induced by lithiation, which could be largely responsible for the high interfacial impedance observed between them. While the underlying mechanism is still uncertain, this first-principles study examines the structural evolution of sulfide materials, Li3PS4 and Li10GeP2S12, upon lithiation and its impact on their transport, electronic and mechanical properties. Our calculations demonstrate that the lithiation reaction is thermodynamically favorable until reaching full lithiation in which PS43- and GeS44- tetrahedral anions are completely decomposed to S2-, P3- and Ge4- atomic ions. This process is also found to involve the transition formation of small P(Ge) clusters and more importantly an increase in the relative density which may cause void formation at the Li metal/SE interface. Moreover, our analyses highlight that, even when fully lithiated, the sulfide materials could retain the high Li-ion conductivity as well as the ability to block electron transport. This suggests that the chemical decomposition of sulfide SEs would not be the only factor that is responsible for the increase of interfacial impedance during electrochemical cycling. © 2022, The Authors. All rights reserved.

关键词： Solid electrolytes

来源：评论

学校读者我要写书评

暂无评论

A Biphasic Liquid System for Low-Power Optothermal Bubble Generation and Enhanced Surface Binding of Proteins

A Biphasic Liquid System for Low-Power Optothermal Bubble Ge...

引用

Novel Optical materials and Applications, NOMA 2020

作者： Kim, Youngsun Zheng, Yuebing Materials Science and Engineering Program and Texas Materials Institute University of Texas at Austin AustinTX78712 United States Department of Mechanical Engineering University of Texas at Austin AustinTX78712 United States

A perfluoropentane-in-water biphasic system, capable of optothermally generating microbubbles at low power, enhanced surface binding of protein by the bulk-To-surface concentration with minimal loss in its activity. &... 详细信息

ISBN: (纸本)9781943580798

关键词： Proteins

来源：评论

学校读者我要写书评

暂无评论

Reconfigurable Assembly of Chiral Metamaterials on Solid Substrates

Reconfigurable Assembly of Chiral Metamaterials on Solid Sub...

引用

Novel Optical materials and Applications, NOMA 2020

作者： Li, Jingang Zheng, Yuebing Materials Science and Engineering Program and Texas Materials Institute University of Texas at Austin AustinTX78712 United States Department of Mechanical Engineering University of Texas at Austin AustinTX78712 United States

We report an all-optical approach to build colloids into active chiral nanostructures on a solid substrate, where the chiroptical response can be tailored on-demand. © 2020 OSA - The Optical Society. All rights r... 详细信息

ISBN: (纸本)9781943580798

关键词： Substrates

来源：评论

学校读者我要写书评

暂无评论

Revealing the EuCd2As2 Semiconducting Band Gap via n-type La-Doping

arXiv

引用

arXiv 2024年

作者： Nelson, Ryan A. King, Jesaiah Cheng, Shuyu Williams, Archibald J. Jozwiak, Christopher Bostwick, Aaron Rotenberg, Eli Sasmal, Souvik Kao, I-Hsuan Tiwari, Aalok Jones, Natalie R. Cai, Chuting Martin, Emma Dolocan, Andrei Shi, Li Kawakami, Roland Heremans, Joseph P. Katoch, Jyoti Goldberger, Joshua E. Department of Chemistry and Biochemistry The Ohio State University ColumbusOH43210 United States Department of Physics The Ohio State University ColumbusOH43210 United States Department of Mechanical and Aerospace Engineering The Ohio State University ColumbusOH43210 United States Department of Materials Science and Engineering The Ohio State University ColumbusOH43210 United States Department of Physics Carnegie Mellon University PittsburghPA15213 United States Materials Science and Engineering Program The University of Texas AustinTX78712 United States Department of Mechanical Engineering The University of Texas AustinTX78712 United States Advanced Light Source E.O. Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Texas Materials Institute The University of Texas AustinTX78712 United States

EuCd2As2 has attracted considerable interest as one of the few magnetic Weyl semimetal candidate materials, although recently there have been emerging reports that claim it to have a semiconducting electronic structure. To resolve this debate, we established the growth of n-type EuCd2As2 crystals, to directly visualize the nature of the conduction band using angle resolve photoemission spectroscopy (ARPES). We show that La-doping leads to n-type transport signatures in both the thermopower and Hall effect measurements, in crystals with doping levels at 2-6 x 1017 e- cm-3. Both p-type and n-type doped samples exhibit antiferromagnetic ordering at 9 K. ARPES experiments at 6 K clearly show the presence of the conduction band minimum at 0.8 eV above the valence band maximum, which is further corroborated by the observation of a 0.71 – 0.72 eV band gap in room temperature diffuse reflectance absorbance measurements. Together these findings unambiguously show that EuCd2As2 is indeed a semiconductor with a substantial band gap and not a topological semimetal. © 2024, CC BY.

关键词： Photoelectron spectroscopy

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：