Graphene as a conductive additive to enhance the high-rate capabilities of electrospun Li₄Ti₅O₁₂ for lithium-ion batteries

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• 作者：Nan Zhu ; Wen Liu ; Mianqi Xue ; Zhuang Xie ; Dan Zhao ; Meining Zhang ; Jitao Chen ; Tingbing Cao
• 关键词：Electrospinning ; Graphene ; Lithium-ion battery ; High-rate charging/discharging
• 刊名：Electrochimica Acta
• 出版年：2010
• 出版时间：1 August 2010
• 年：2010
• 卷：55
• 期：20
• 页码：5813-5818
• 全文大小：1200 K

文摘

Spinel Li₄Ti₅O₁₂ (LTO) is a promising candidate anode material for Li-ion batteries due to its well-known zero-strain merits. To improve the electronic properties of spinel LTO, which are intrinsically poor, we processed the material into a nanosized architecture to shorten the distance for Li-ion and electron transport using the versatile electrospinning method. Graphene was chosen as an effective carbon coating to improve the surface conductivity of the nanocomposites. The as-prepared graphene-embedded LTO anode material showed improved discharging/charging and cycling properties, particularly at high rates, such as 22 C, which makes the nanocomposite an attractive anode material for applications in electric vehicles.