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

Xiao Liang Wang, Wei Qiang Han, Haiyan Chen, Jianming Bai, Trevor A. Tyson, Xi Qian Yu, Xiao Jian Wang, Xiao Qing Yang

Research output: Contribution to journalArticlepeer-review

252 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)20692-20695
Number of pages4
JournalJournal of the American Chemical Society
Volume133
Issue number51
DOIs
StatePublished - Dec 28 2011

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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