Electrochemical exfoliation of graphene as an anode material for ultra-long cycle lithium ion batteries

被引:32
|
作者
Zhao, Xin [1 ,3 ]
Li, Hongyan [2 ]
Han, Fangjie [1 ,3 ]
Dai, Mengjiao [1 ,3 ]
Sun, Yingjuan [2 ]
Song, Zhongqian [1 ,3 ]
Han, Dongxue [1 ,3 ,4 ]
Niu, Li [1 ,3 ,4 ]
机构
[1] Chinese Acad Sci, CAS Ctr Excellence Nanosci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem,Engn Lab Modern, Changchun 130022, Peoples R China
[2] Jinan Univ, Coll Chem & Mat Sci, Dept Mat Sci & Engn, Guangzhou 510632, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100039, Peoples R China
[4] Guangzhou Univ, Ctr Adv Analyt Sci, Sch Chem & Chem Engn, MOE Key Lab Water Qual & Conservat Pearl River, Guangzhou 510006, Peoples R China
关键词
Exfoliated graphene; Anode; Ultra-long cycle; Lithium ion batteries; Energy storage; HIGH-CAPACITY; CATHODE MATERIALS; ENERGY-STORAGE; HYBRID FILMS; CARBON; PERFORMANCE; LI; NANOSHEETS; GRAPHITE; ELECTRODES;
D O I
10.1016/j.jpcs.2019.109301
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
One of the key challenges in developing lithium ion batteries is the super-long cycles. Two-dimensional (2D) materials (especially graphene) with a layered crystal structure disclose many advantages and attract more interests in this field. Here we report a novel method through which the electrochemically exfoliated graphene (EG) is employed to construct an anode for ultra-long cycle Liq-ion batteries. The high quality EG was directly sprayed onto the copper foil as a binder-free material, resulting in high conductivity, high volume capacity and bridging properties. The battery has exhibited a high capacity of 356 mA h g(-1) at 1 A g(-1), with similar to 100% capacity retention over 6500 cycles. This work demonstrates that the excellent graphene preparation process combined with binder-less spraying is effective strategy to significantly improve the cyclic stability of Li-ion batteries.
引用
收藏
页数:6
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