微乳液法制备锂离子电池纳米铜锡合金负极材料

Microemulsion synthesis of nanosized copper-tin alloy as negative electrode materials for lithium-ion batteries

用反相微乳液法制备出了具有无定形结构的纳米铜锡合金,并将其用作锂离子电池的阳极材料.颗粒粒径为50-60nm的铜锡合金在0-1.2V之间充放电具有300mAh/g的稳定比容量,50次循环的容量保持率为93.3%.微乳液工艺中乳化剂的含量、热处理工艺中热处理的温度以及电极制备工艺中导电剂的含量对材料电化学性能有较大的影响.

Nanosized copper-tin alloy with amorphous structures were prepared by a reverse microemul-sion technique and used as anode materials for lithium- ion batteries. When charged/discharged between 0- 1.2V, copper- tin alloy with particle size of 50-60 nm has a reversible specific capacity of 300 mAh/g and capacity retention after 50 cycles is 93.3 %. Materials electrochemical performance is greatly influenced by surfactant content, heat-treatment temperature and conductive agent content.