自支撑 Li4Ti5O12-C 纳米管阵列作为用于柔性锂离子电池的高倍率长寿命阳极材料。
Self-supported Li4Ti5O12-C nanotube arrays as high-rate and long-life anode materials for flexible Li-ion batteries.
机构信息
CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China , Hefei, Anhui 230026, China.
出版信息
Nano Lett. 2014 May 14;14(5):2597-603. doi: 10.1021/nl5004174. Epub 2014 Apr 17.
Self-supported Li4Ti5O12-C nanotube arrays with high conductivity architectures are designed and fabricated for application in Li-ion batteries. The Li4Ti5O12 nanotube arrays grow directly on stainless steel foil by a facile template-based solution route, further enhancing electronic conductivity by uniform carbon-coating on the inner and outer surfaces of Li4Ti5O12 nanotubes. Owing to the shortened Li(+) diffusion distance, high contact surface area, sufficient conductivity, and very good structure stability of the nanotube arrays, the self-supported Li4Ti5O12-C nanotube arrays exhibit remarkable rate capability (a reversible capability of 135 mA h g(-1), 105 mA h g(-1), and 80 mA h g(-1) at 30C, 60C, and 100C, respectively) and cycling performance (approximate 7% capacity loss after 500 cycles at 10C with a capacity retention of 144 mA h g(-1)).
自支撑 Li4Ti5O12-C 纳米管阵列具有高导电性结构，专为锂离子电池应用而设计和制造。Li4Ti5O12 纳米管阵列通过简便的基于模板的溶液途径直接在不锈钢箔上生长，通过在 Li4Ti5O12 纳米管的内外表面均匀涂覆碳进一步提高了电子导电性。由于纳米管阵列的 Li(+)扩散距离缩短、高接触表面积、足够的导电性和非常好的结构稳定性，自支撑 Li4Ti5O12-C 纳米管阵列表现出显著的倍率性能（在 30C、60C 和 100C 时的可逆容量分别为 135 mA h g(-1)、105 mA h g(-1)和 80 mA h g(-1)）和循环性能（在 10C 下 500 次循环后容量损失约为 7%，容量保持率为 144 mA h g(-1)）。
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