Amorphous hierarchical porous GeO x as high-capacity anodes for Li ion batteries with very long cycling life

Document Type

Article

Publication Date

12-28-2011

Abstract

Many researchers have focused in recent years on resolving the crucial problem of capacity fading in Li ion batteries when carbon anodes are replaced by other group-IV elements (Si, Ge, Sn) with much higher capacities. Some progress was achieved by using different nanostructures (mainly carbon coatings), with which the cycle numbers reached 100-200. However, obtaining longer stability via a simple process remains challenging. Here we demonstrate that a nanostructure of amorphous hierarchical porous GeO x whose primary particles are ∼3.7 nm diameter has a very stable capacity of ∼1250 mA h g -1 for 600 cycles. Furthermore, we show that a full cell coupled with a Li(NiCoMn) 1/3O 2 cathode exhibits high performance. © 2011 American Chemical Society.

Identifier

84555187088 (Scopus)

Publication Title

Journal of the American Chemical Society

External Full Text Location

https://doi.org/10.1021/ja208880f

e-ISSN

15205126

ISSN

00027863

First Page

20692

Last Page

20695

Issue

51

Volume

133

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