【摘 要】
：
锂离子正极材料主要集中在钴系、镍系、锰系、铁系。镍钴锰酸锂三元材料以其更低的制备成本和较好的电化学性能也引起了人们的广泛关注。目前对于三元材料的合成一般是先通过
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锂离子正极材料主要集中在钴系、镍系、锰系、铁系。镍钴锰酸锂三元材料以其更低的制备成本和较好的电化学性能也引起了人们的广泛关注。目前对于三元材料的合成一般是先通过氢氧化物共沉淀法,在氨水的辅助下先合成前驱体,然后再经过高温烧结合成目标材料。这种前驱体合成方法对工艺参数要求高,较难稳定控制,并且氨水的使用对环境将造成污染。本文通过碳酸盐共沉淀法合成(Ni_(0.4)Co_(0.2)Mn_(0.4))CO_3前驱体来避免上述问题,并且通过合理的制备过程,以不同锂比合成Li_(1+x)Ni_(0.4)Co_(0.2)Mn_(0.4)O_(2+δ)材料。
Lithium-ion cathode materials are mainly concentrated in cobalt, nickel, manganese, iron. Nickel-cobalt-manganese-lithium ternary materials have aroused people’s attention due to its lower preparation cost and better electrochemical performance. At present, the synthesis of ternary materials is generally first by hydroxide co-precipitation method, with the aid of ammonia to synthesize precursors, and then after high temperature sintering the target material. This precursor synthesis method of the process parameters require high, more difficult to control, and the use of ammonia on the environment will cause pollution. In this paper, the (Ni_ (0.4) Co_ (0.2) Mn_ (0.4)) CO_3 precursor was synthesized by the carbonate coprecipitation method to avoid the above problems. Through reasonable preparation process, Li_ (1 + x) Ni_ (0.4) Co 0.2 Mn 0.4 O 2 + δ.
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