Tempura-like carbon/carbon composite as advanced anode materials for K-ion batteries

作     者：Hao-Jie Liang Zhen-Yi Gu Xue-Ying Zheng Wen-Hao Li Ling-Yun Zhu Zhong-Hui Sun Yun-Feng Meng Hai-Yue Yu Xian-Kun Hou Xing-Long Wu Hao-Jie Liang;Zhen-Yi Gu;Xue-Ying Zheng;Wen-Hao Li;Ling-Yun Zhu;Zhong-Hui Sun;Yun-Feng Meng;Hai-Yue Yu;Xian-Kun Hou;Xing-Long Wu

作者机构：MOE Key Laboratory for UV Light-Emitting Materials and TechnologyNortheast Normal UniversityChangchun 130024China Key Laboratory of Preparation and Application of Environmental Friendly Materials(Jilin Normal University)Ministry of EducationChangchun 130103China Institute of New Energy for VehiclesTongji University201804 ShanghaiChina CAS Key Laboratory of Nanosystem and Hierarchical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology100190 BeijingChina Center for Advanced Analytical ScienceSchool of Chemistry and Chemical EngineeringMOE Key Laboratory for Water Quality and Conservation of the Pearl River DeltaGuangzhou UniversityGuangzhou 510006China National&Local United Engineering Laboratory for Power BatteriesFaculty of ChemistryNortheast Normal UniversityChangchun 130024China 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2021年第30卷第8期

页      面：589-598,I0012页

核心收录：

学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：the financial support from the National Natural Science Foundation of China(No.91963118) the 111 Project(No.B13013) supported by the Open Project Program of Key Laboratory of Preparation and Application of Environmental Friendly Materials(Jilin Normal University),Ministry of Education,China(No.2020004) 

主　　题：K-ion batteries Anode materials Carbon/carbon composite S doping Cyclic stability DFT calculation 

摘      要：Graphite as a promising anode candidate of K-ion batteries(KIBs)has been increasingly studied currently,but corresponding rate performance and cycling stability are usually inferior to amorphous carbon *** protect the layer structure and further boost performance,tempura-like carbon/carbon nanocomposite of graphite@pitch-derived S-doped carbon(G@PSC)is designed and prepared by a facile and low-temperature modified molten salt *** robust encapsulation structure makes their respective advantages complementary to each other,showing mutual promotion of electrochemical performances caused by synergy *** a result,the G@PSC electrode is applied in KIBs,delivering impressive rate capabilities(465,408,370,332,290,and 227 m A h g^(-1)at 0.05,0.2,0.5,1,2,and 5 A g^(-1))and ultralong cyclic stability(163 m A g^(-1)remaining even after 8000 cycles at 2 A g^(-1)).On basis of ex-situ studies,the sectionalized K-storage mechanism with adsorption(pseudocapacitance caused by S doping)-intercalation(pitch-derived carbon and graphite)pattern is ***,the exact insights into remarkable rate performances are taken by electrochemical kinetics tests and density functional theory *** a word,this study adopts a facile method to synthesize high-performance carbon/carbon nanocomposite and is of practical significance for development of carbonaceous anode in KIBs.