Highly Stable Mesoporous Ge@C Sphere Anodes for Lithium-ion Batteries

DOI

10.2991/emcpe-16.2016.104How to use a DOI?

Keywords

highly stable; mesoporous; germanium; anode; lithium-ion batteries

Abstract

The Mesoporous Ge@C sphere has been designed via a modified St”ber method and an in-situ solution deposition. Compared with the pure Ge nanoparticles, the as-synthesized Mesoporous Ge@C sphere nanocomposites show much better cycling stability and rate capability. That as-prepared anode material can maintain a reversible capacity of 708.8mAhg-1 after 200 cycles at a rate of 0.2C, and even at 5C, it also exhibits a high discharge capacity of ~522.4mAhg-1. The superior comprehensive electrochemical performance of the electrode is ascribed to the synergic effects of the porous structure and hollow carbon sphere, which can effectively alleviate the structural strain and suppress large volume changes, additionally, can reduce electrolyte diffusion path length beneficial to allow rapid electron transportation and let more Li+ flux across the interface.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Chen Cheng
AU  - Jing Xu
AU  - Kai Xie
PY  - 2016/08
DA  - 2016/08
TI  - Highly Stable Mesoporous Ge@C Sphere Anodes for Lithium-ion Batteries
BT  - Proceedings of the 2016 5th International Conference on Environment, Materials, Chemistry and Power Electronics
PB  - Atlantis Press
SN  - 2352-5401
UR  - https://doi.org/10.2991/emcpe-16.2016.104
DO  - 10.2991/emcpe-16.2016.104
ID  - Cheng2016/08
ER  -