Homovalent doping: An efficient strategy of the enhanced TiNb2O7 anode for lithium-ion batteries
作者机构：Department of Materials Science and EngineeringChina University of Mining & Technology (Beijing) Department of Materials Science and EngineeringChina University of Mining&Technology (Beijing)
出 版 物：《Green Energy & Environment》 (绿色能源与环境(英文))
年 卷 期：2024年第9卷第8期
页 面：1257-1266页
核心收录：
学科分类：0820[工学-石油与天然气工程] 0808[工学-电气工程] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 0703[理学-化学]
基 金：supported by the National Natural Science Foundation of China (52272258) Beijing Nova Program(20220484214) Fundamental Research Funds for the Central Universities (No. 2021JCCXJD01) Key R&D and transformation projects in Qinghai Province (2021-HZ-808) and Hebei Province (21314401D)
主 题：Homovalent doping Zr 4+ TiNb 2 O 7 Microsphere Lithium-ion batteries
摘 要：The low energy density,unsatisfied cycling performance,potential safety issue and slow charging kinetics of the commercial lithium-ion batteries restrained their further application in the fields of fast charging and long-haul electric *** TiNb2O7（TNO） with the theoretical capacity of 387 mAh g-1has been proposed as a high-capacity anode materials to replace *** this work,homovalent doping strategy was used to enhance the electrochemical performance of Ti Nb2O7（TNO） by employing Zr to partial substitute Ti through solvothermal *** doping of Zr4+ions can enlarge the lattice structure without changing the chemical valence of the original elements,refine and homogenize the grains,improve the electrical conductivity,and accelerate the ion diffusion kinetics,and finally enhance the cycle and rate ***,Z0.05-TNO shows initial discharge capacity of as high as 312.2 mAh g-1at 1 C and 244.8 mAh g-1at 10 C,and still maintains a high specific capacity of 171.3 mAh g-1after 800 cycles at 10 *** study provides a new strategy for high-performance fastcharging energy storage electrodes.
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