Co2GeO4/graphene hetero-architecture as a potential anode for sodium ion batteries

被引：8
作者：
Babu, G. N. Suresh [1 ]
Kalaiselvi, N. [2 ]
机构：
[1] Acad Sci & Innovat Res AcSIR, New Delhi, India
[2] CSIR Cent Electro Chem Res Inst, Karaikkudi 630003, Tamil Nadu, India
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2021年 / 150卷
关键词：
Germanium; Graphene; Alloying anode; Hetro architecture; Sodium; Rate capability; ENHANCED LITHIUM-STORAGE; GRAPHENE OXIDE; PERFORMANCE; NANOSHEETS; COMPOSITE; CARBON; CONSTRUCTION; ELECTRODE; GRAPHITE;
D O I：
10.1016/j.jpcs.2020.109863
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Graphene encapsulated Co2GeO4 (CGO) nanoplates are investigated as a potential anode for sodium ion battery applications for the very first time. Herein, we design and synthesize nanoplates like Co2GeO4/graphene (CGO/G) composite to enable efficient sodium storage behavior while retaining the general advantages of nano structures. The complete wrapping of Co2GeO4 (CGO) nanoplates by graphene sheets is clearly evidenced from HRTEM analysis. Our exclusively designed architecture offers the required electronic web for the fast and facile diffusion of electrons and can effectively accommodate the volume changes of electroactive Co2GeO4 (CGO) materials during cycling. As a result, the as prepared Co2GeO4 (CGO) nanoplates with graphene wrapping shows acceptable specific capacity of 319 mAh g 1 at 100 mAg(-1) current density after 100 cycles, stable cyclability 84% capacity retention is achieved after 100 cycles and delivers rate capability of 151 mAh g(-1) at 1 A g(-1).
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页数：9
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