Cooperative enhancement of electrochemical properties in double carbon-decorated Li4Ti5O12/C composite as anode for Li-ion batteries
作者： Fangfang Li , Penghui Chen , Hao Wu , Yun Zhang
DOI: 10.1016/J.JALLCOM.2015.01.263
关键词: Thermal decomposition 、 Anode 、 Chemical engineering 、 Electrochemistry 、 Amorphous carbon 、 Composite number 、 Carbon 、 Materials science 、 Lithium titanate 、 Stearic acid
摘要: Abstract In this study, we presented the design and preparation of a double nano-carbon modified Li4Ti5O12 composite, where an amorphous carbon layer derived from thermal decomposition stearic acid (SA) was coated on surface Li4Ti5O12, while decorated with carbon-nanotubes (CNTs) as conductive network. A series Li4Ti5O12–SA/CNTs composite prepared by changing amount added SA CNTs, effects their proportion electrochemical properties as-prepared composites were systematically investigated. It found that when used anode materials for lithium-ion batteries (LIBs), Li4Ti5O12–CNTs/SA adding 0.4 wt.% (mCNTs:mLi4Ti5O12) CNTs 12 wt.% (mSA:mLi4Ti5O12) showed remarkably high discharge specific capacity 215.8 mA h g−1 retention reached 96.7% delivering stable 145.0 mA h g−1 after 100 cycles at rate 5 C. Our work revealed there is cooperative effect resulted proper SA, enabling significant improvement performances LIBs.
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