Abstract：
With the large-scale application of lithium-ion batteries (LIBs), a huge amount of spent LIBs will be generated each year and how to realize their recycling and reuse in a clean and effective way poses a challenge to the society. In this work, using the electrolyte of spent LIBs as solvent, we in-situ fluorinate the conductive three-dimensional porous copper foam by a facile solvent-thermal method and then coating it with a cross-linked sodium alginate (SA) layer. Benefiting from the solid-electrolyte interphase (SEI) that accommodating the volume change of internal CuF2 core and SA layer that inhibiting the dissolution of CuF2, the synthesized CuF2@void@SEI@SA cathode with a pomegranate-like structure (yolk-shell) exhibits a large reversible capacity of ~535 mAh g-1 at 0.05 A g-1 and superb cycling stability. This work conforms to the development concept of green environmental protection and comprehensively realizes the unity of environmental, social and economic benefits.
摘要：
随着锂离子电池(LIBs)的大规模应用,每年都会产生大量的LIB，如何以清洁有效的方式实现它们的回收和再利用对社会构成了挑战。在这项工作中,使用废LIB的电解质作为溶剂，我们通过简单的溶剂热方法原位氟化导电三维多孔泡沫铜，然后用交联的海藻酸钠（SA）层涂覆。受益于固体电解质中间相（SEI），可容纳内部CuF2核和SA层的体积变化，从而抑制CuF2的溶解，合成的具有石榴状结构的CuF2@void@SEI@SA阴极（蛋黄壳）在0.05Ag-1时表现出〜535mAhg-1的可逆容量和出色的循环稳定性。这项工作符合绿色环保的发展理念,全面实现了环境的统一,经济效益和社会效益。
