锂离子电池关键材料研制、结构和性能表征

来源 :第31届全国化学与物理电源学术年会 | 被引量 : 0次 | 上传用户:ty_142857
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随着电子产品的日益小型化与功能集成化、电动汽车、新能源与可再生能源发电规模储能及智能电网建设的发展,对现有的化学电源体系的综合性能如能量和功率密度、寿命、成本、安全性等提出了越来越高的要求.锂离子作为当前广泛应用的化学电源,其性能取决于关键材料,包括正、负极活性物质,粘合剂,电解液,隔膜等,同时也依赖于电池内各种材料之间界面的性质.本文报道我们在锂离子电池硅负极新型粘合剂开发,金属氧化物负极和富锂层状正极材料的结构和性能调控研究的进展,以及发展原位XRD等方法研究锂离子电池关键材料及其界面过程.
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针对于目前广泛需求,研究人员提出了一种锂离子表面交换电池,由于在工作过程中,主要涉及大量表面官能团与锂离子快速的交换过程,从而能保证快速充放电的同时,也保证了能量密度.其重要材料就是功能化的碳材料,以碳纳米管与石墨烯材料为主.在此项工作中,针对于此类电化学体系中的应用,开发出来一种简单、适合于量产的石墨烯的制备工艺,所得石墨烯比表面积高达487 m2/g.而后,将所得的功能化石墨烯材料用作电极材料
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