摘要
本研究利用结构设计理念将TiNCl应用于高倍率锂离子电池,并解释其储能机理.由于Ti-N层的高导电性,它可作为电子导电单元.由Cl层构成的多面体通道有助于锂离子的传输,并作为离子传输单元.此外,由于TiNCl中的Cl带负电的特性,负极材料在1 mV s^(-1)下的赝电容贡献率高达99.5%.而在50 C的高倍率下,经过1000次循环后,它依旧保持极高的可逆比容量(202 mA h g^(-1)).这种基于结构单元的设计理念对于研发高性能新型电极材料具有指导意义.
In this study,TiNCl was designed and applied in high-rate lithium-ion batteries(LIBs),and the mechanism of the energy storage in TiNCl was uncovered.The Ti-N layer serves as the electronic conductive unit for its high conductivity,while the polyhedral channels constructed with Cl facilitate the transmission of Li ions serving as the ionic conductive units.In addition,due to the negatively charged nature of Cl,the TiNCl anode has a capacitive contribution up to 99.5%at 1 mV s.Even at a high rate of 50 C,it still retains a remarkable reversible capacity of 202 mA h gafter 1000 cycles.The concept based on the structure design develops new electrode materials with desired properties.
作者
樊灵刚
张绍宁
董武杰
徐吉健
车相立
李睿哲
毕辉
黄富强
Linggang Fan;Shaoning Zhang;Wujie Dong;Jijian Xu;Xiangli Che;Ruizhe Li;Hui Bi;Fuqiang Huang(State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;State Key Laboratory of Rare Earth Materials Chemistry and Applications,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China)
基金
supported by the National Natural Science Foundation of China(21871008 and 51972326)
the Key Research Program of Chinese Academy of Sciences(QYZDJ-SSW-JSC013)
the Science and Technology Commission of Shanghai Municipality(22ZR1471300)
the Youth Innovation Promotion Association CAS。
