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Inna Smolianova


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Journal of Zhejiang University SCIENCE A 2020 Vol.21 No.5 P.392-400


A high-capacity graphene/mesocarbon microbead composite anode for lithium-ion batteries

Author(s):  Inna Smolianova, Jin-long Hu, Xin-yue Zhao, Viacheslav Dementiev, Ling-zhi Zhang

Affiliation(s):  CAS Key Laboratory of Renewable Energy, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; more

Corresponding email(s):   lzzhang@ms.giec.ac.cn

Key Words:  Graphene, Mesocarbon microbead (MCMB), Composite anode materials, Lithium-ion batteries

Inna Smolianova, Jin-long Hu, Xin-yue Zhao, Viacheslav Dementiev, Ling-zhi Zhang. A high-capacity graphene/mesocarbon microbead composite anode for lithium-ion batteries[J]. Journal of Zhejiang University Science A, 2020, 21(5): 392-400.

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author="Inna Smolianova, Jin-long Hu, Xin-yue Zhao, Viacheslav Dementiev, Ling-zhi Zhang",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T A high-capacity graphene/mesocarbon microbead composite anode for lithium-ion batteries
%A Inna Smolianova
%A Jin-long Hu
%A Xin-yue Zhao
%A Viacheslav Dementiev
%A Ling-zhi Zhang
%J Journal of Zhejiang University SCIENCE A
%V 21
%N 5
%P 392-400
%@ 1673-565X
%D 2020
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1900600

T1 - A high-capacity graphene/mesocarbon microbead composite anode for lithium-ion batteries
A1 - Inna Smolianova
A1 - Jin-long Hu
A1 - Xin-yue Zhao
A1 - Viacheslav Dementiev
A1 - Ling-zhi Zhang
J0 - Journal of Zhejiang University Science A
VL - 21
IS - 5
SP - 392
EP - 400
%@ 1673-565X
Y1 - 2020
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1900600

The graphene/mesocarbon microbead (MCMB) composite is assessed as an anode material with a high capacity for lithium-ion batteries. The composite electrode exhibits improved cycling stability and rate capability, delivering a high initial charge/discharge capacity of 421.4 mA∙h/g/494.8 mA∙h/g as well as an excellent capacity retention over 500 cycles at a current density of 40 mA/g. At a higher current density of 800 mA/g, the electrode still retains 35% of its initial capacity which exceeds the capacity retention of pure graphene or MCMB reference electrodes. Cyclic voltammetry and electrochemical impedance spectroscopy reveal that the composite electrode favors electrochemical kinetics as compared with graphene and MCMB separately. Superior electrochemical properties suggest a strong synergetic effect between highly conductive graphene and MCMB.


目的:电动汽车和大规模储能的发展对锂离子电池的能量密度提出了更高的要求,但现有商业石墨负极容量难以满足要求. 本文结合石墨烯高电导和高容量的优点以及中间相碳微球材料循环稳定性优良的优势,研究和报道一种容量高和循环性能好的石墨烯/中间相碳微球复合负极材料.
方法:1. 通过选择高电导率石墨烯和中间相碳微球,制备石墨烯和中间相碳微球复合负极材料. 2. 选用商业聚偏氟乙烯(PVDF)粘结剂,制备复合材料电极极片,测试和表征电极的形貌、电导以及半电池的充放电等电化学性能,并优化复合材料质量比. 3. 选择优化的复合负极材料(GMC (8:2)),研究其长循环性能.
结论:中间相碳微球的球形结构能有效防止石墨烯的折叠团聚,从而发挥石墨烯的高电导性能. 因此,石墨烯/中间相碳微球复合负极材料表现出了 很好的倍率性能和循环性能,且其容量达到了 421 mA∙h/g以上,高于商业石墨的理论容量,具有潜在的应用前景.

关键词:石墨烯; 中间相碳微球; 负极材料; 锂离子电池

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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