title: Amorphous hierarchical porous GeO(x) as high-capacity anodes for Li ion batteries with very long cycling life.
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)(1/3)O(2) cathode exhibits high performance.
authors.affiliation: Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA.
authors.forename: Xiao-Liang
authors.initials: XL
authors.lastname: Wang
authors.forename: Wei-Qiang
authors.initials: WQ
authors.lastname: Han
authors.forename: Haiyan
authors.initials: H
authors.lastname: Chen
authors.forename: Jianming
authors.initials: J
authors.lastname: Bai
authors.forename: Trevor A
authors.initials: TA
authors.lastname: Tyson
authors.forename: Xi-Qian
authors.initials: XQ
authors.lastname: Yu
authors.forename: Xiao-Jian
authors.initials: XJ
authors.lastname: Wang
authors.forename: Xiao-Qing
authors.initials: XQ
authors.lastname: Yang