Modified SiO as a high performance anode for Li-ion batteries

作者：Hwa Yoon; Park Cheol Min; Sohn Hun Joon^*

来源：Journal of Power Sources, 2013, 222: 129-134.

DOI：10.1016/j.jpowsour.2012.08.060

• Lithium ion battery
• Anode
• Silicon monoxide
• Disproportionation reaction

An anode material with improved electrochemical performances for Li-ion batteries is prepared using the disproportionation reaction of SiO followed by a high energy mechanical milling process. The modified SiO is composed of embedded Si nano-crystallites in a Si-oxide matrix. Si-oxide matrix could be divided into two parts by reactivity with Li-ion. The inactive Si-suboxide matrix would buffer the volume expansion of embedded Si nano-crystallites and active amorphous SiO2 during the lithiation. This modified SiO electrode shows a large reversible capacity, close to 1000 mAh g(-1), and good cyclability, over 50 cycles.

• 出版日期2013-1-15