【摘要】 以红磷（RP）为原材料，采用球磨法制备了红磷/碳纳米管（RC）复合材料，再将RC分散于噻吩单体中，经原位聚合制备了聚噻吩包混红磷/碳纳米管（RCP）复合材料。分别以RP、RC和RCP为活性负极材料，组装扣式锂离子半电池，研究了电池循环伏安特性和循环、倍率性能。结果表明，聚噻吩能够提高材料的导电性，抑制体积膨胀，RCP负极电池性能最优。在0.2 A/g的电流密度下，首圈可逆比容量高达2 100 mAh/g，是RC负极电池的1.3倍；在100圈充放电循环后容量保持在900 mAh/g，容量保持率高达43%。更多还原

【Abstract】 Red phosphorus(RP)/carbon nanotube composites(RC) were fabricated via a ball milling method using RP as the raw material. Subsequently, RC were dispersed in thiophene monomer, and polythiophene-coated RC(RCP) were successfully prepared through in-situ polymerization. Button-type lithium-ion half-cells were assembled with RP, RC, and RCP serving as the active anode materials, respectively. The cyclic voltammetry behavior, cycling stability, and rate capability of the assembled cells were systematically investigated. The results indicated that polythiophene coating can effectively enhance the electrical conductivity of the composite materials and suppress their volume expansion during charge-discharge processes, endowing the RCP anode with the optimal electrochemical performance. Specifically, at a current density of 0. 2 A/g, the RCP anode delivers a high initial reversible specific capacity of 2 100 mAh/g, which is 1. 3 times that of the RC anode. After 100 cycles of charge-discharge, the specific capacity of the RCP anode remains at 900 mAh/g, corresponding to a high capacity-retention rate of 43 %.更多还原