常熟理工学院学报2024，Vol.38Issue(5) ：15-18.

氮掺杂三维硬碳材料的设计合成及其储锂性能研究

Toward Highly Selective Heteroatom Dopants in Hard Carbon with Superior Lithium Storage Performance

吕玮阳 毛旭东 唐钰婷 张恒 王程杰 陈纪然 陶石
常熟理工学院学报2024，Vol.38Issue(5) ：15-18.
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氮掺杂三维硬碳材料的设计合成及其储锂性能研究

Toward Highly Selective Heteroatom Dopants in Hard Carbon with Superior Lithium Storage Performance

吕玮阳 1毛旭东 1唐钰婷 1张恒 1王程杰 1陈纪然 1陶石2
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作者信息

  • 1. 常熟理工学院电子信息工程学院,江苏常熟 215500
  • 2. 常熟理工学院电子信息工程学院,江苏常熟 215500;常熟理工学院江苏省新型功能材料重点建设实验室,江苏常熟 215500
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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1 000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.

Abstract

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 1 000 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.

关键词

硬碳/氮掺杂/负极/锂离子电池

Key words

hard carbon/nitrogen doping/anode/lithium ion batteries

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出版年

2024
常熟理工学院学报
常熟理工学院

常熟理工学院学报

影响因子：0.206
ISSN：1008-2794
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