Superfine Expanded Graphite with Large Capacity for Lithium Storage

被引：13

作者：

Kaskhedikar, Nitin A. ^{[1
]}

Cui, Guanglei ^{[1
]}

Maier, Joachim ^{[1
]}

Fedorov, Vladimir ^{[2
]}

Makotchenko, Victor ^{[2
]}

Simon, Arndt ^{[1
]}

机构：

[1] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany

[2] Russian Acad Sci, Siberian Branch, Nikolaev Inst Inorgan Chem, Novosibirsk 630090, Russia

来源：

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | 2011年 / 637卷 / 05期

关键词：

Graphene; Lithium storage; Electrochemistry; Carbon vacancies; Nanoionics; INSERTION; INTERCALATION; CARBONS; ANODE;

D O I：

10.1002/zaac.201000364

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A superfine expanded graphite (s-EG) fiber material was investigated as an anode material for lithium-based batteries. The fibers were prepared by decomposition of dicarbon monofluoride-intercalated graphite. The high resolution transmission electron microscopy (HRTEM) images showed the fiber thickness in range of 2-3 nm with several microns in length. Lithium storage capacity in this material was measured in lithium half cells. High lithium storage capacity of about 1000 mAh.g(-1) at a rate of C/10, corresponding to Li3C6 composition was obtained. The material showed fairly good rate capability exhibiting lithium storage capabilities even at 60C. As a effect of ball milling, the s-EG showed crystallographic ordering in the sample with reduced the lithium storage capacity corresponding to composition of LiC6. A simple mathematical relation to account for the excess lithium storage capacity in this material is put forward.

引用

页码：523 / 529

页数：7

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