摘要
硬碳(HCs)在下一代高密度锂离子电池(Lithium-Ion Batteries,LIBs)候选负极中得到广泛的关注.然而,电压滞后、低速率容量和较大的初始不可逆容量严重影响了其广泛应用.本文提出了熔融盐法制备基于三维框架和分层多孔结构氮原子(N)掺杂HC负极(NHC),在10.0 A/g下具有315 mAh/g的优良倍率性能,在3 A/g下进行1000次循环后,具有90.3%的长期循环稳定性.此外,所构建的软包全电池提供了483.8 Wh/kg的高能量密度和快速充电能力.本研究的通用策略为合理设计先进碳质材料开辟了新途径.
Hard carbons(HCs)have gained much attention for next-generation high energy density lithium ion battery(LIB)anode candidates.However,voltage hysteresis,low-rate capability,and large initial irreversible capacity severely affect their wide application.Here in the paper,a general strategy is reported to fabricate nitrogen atom(N)-doped HC anodes with superb rate capability and cyclic stability based on a three-dimensional(3D)framework and a hierarchical porous structure.The obtained N-doped hard carbon(NHC)exhibits an excellent rate capability of 315 mAh/g at 10.0 A/g and a long-term cyclic stability of 90.3%capacity retention after 1000 cycles at 3 A/g.Moreover,the as-constructed pouch cell delivers a high energy density of 483.8 Wh/kg and fast charging capability.The versatile strategy in this work opens an avenue for the rational design of advanced carbonaceous materials with high performance for LIB applications.
作者
吕玮阳
毛旭东
唐钰婷
张恒
王程杰
陈纪然
陶石
LÜWeiyang;MAO Xudong;TANG Yuting;ZHANG Heng;WANG Chengjie;CHEN Jiran;TAO Shi(School of Electronic and Information Engineering;Jiangsu Laboratory of Advanced Functional Materials,Changshu Institute of Technology,Changshu 215500,China)
出处
《常熟理工学院学报》
2024年第5期15-18,共4页
Journal of Changshu Institute of Technology
基金
江苏省高等学校基础科学(自然科学)研究重大项目“双金属硫族化合物的异质结构设计合成及其界面电荷转移特性研究”(23KJA430001)。
关键词
硬碳
氮掺杂
负极
锂离子电池
hard carbon
nitrogen doping
anode
lithium ion batteries
