Abstract—

We have studied the performance of nanotubular nickel hydrosilicate and its derivatives as a negative electrode of lithium ion batteries. Nickel hydrosilicate with the composition Ni₃Si₂O₅(OH)₄ was synthesized under hydrothermal conditions (350°C, 14 MPa, 10 h). Its derivatives were prepared by thermal annealing at temperatures of 400, 600, and 1000°C. In this process, the tubular structure of the particles persisted up to 600°C, whereas at 1000°C well-crystallized Ni₂SiO₄ was formed. Charge/discharge cycles were performed in the voltage range 0.05–3 V at a specific current of 10 mA/g. Heat treatment was shown to increase discharge capacity and reversible capacity in the first cycle. The highest performance was offered by the material heat-treated at 400°C: its discharge capacity reached 678 mAh/g and its reversible capacity was 58% in the first cycle and 85% in subsequent cycles.

中文翻译：

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纳米管氢硅酸镍及其作为锂离子电池负极材料的热退火产品

摘要-

我们已经研究了纳米管氢硅酸镍及其衍生物作为锂离子电池负极的性能。在水热条件下（350℃，14 MPa，10 h）合成了成分为Ni ₃ Si ₂ O ₅（OH）_4的氢硅酸镍。通过在400、600和1000°C的温度下进行热退火来制备其衍生物。在此过程中，颗粒的管状结构持续到600°C，而在1000°C时结晶良好的Ni ₂ SiO ₄成立了。充电/放电周期是在0.05–3 V的电压范围内以10 mA / g的特定电流执行的。热处理在第一循环中显示出增加的放电容量和可逆容量。在400°C热处理的材料可提供最高的性能：其放电容量达到678 mAh / g，其可逆容量在第一个循环中为58％，在随后的循环中为85％。