【摘要】 在预先原位合成的聚吡咯溶液中通过简单沉淀得到SnO2/聚吡咯负极材料,对材料的结构、形貌进行了表征并对材料的电化学性能进行了研究.发现不同形貌的聚吡咯对负极材料的电化学性能存在一定影响:SnO2负极材料在球状聚吡咯体系中比在管状聚吡咯体系中的电化学性能优越,首次库仑效率提高至77.6%,60次循环后仍剩余600 mA·h/g的可逆比容量.更多还原

【Abstract】 SnO2/ polypyrrole composites as anode material of lithium ion batteries were in-situ prepared by an one-step precipitation in the suspension of the polypyrrole synthesized in advance. It is found that the morpho-logy of polypyrrole has an obvious effect on the electrochemical performance of SnO2/ polypyrrole composite anode. The granular polypyrrole( G-PPy) displayed advantages over the tubular polypyrrole. The composite containing G-PPy reached the first coulombic efficiency of 77. 6% and remained a reversible specific capacity higher than 600 mA·h / g after 60 cycles. The good flexibility and adhesion of polypyrrole could make a contribution to the enhancement of the electrochemical performance of SnO2based anode.更多还原