A versatile single molecular precursor for the synthesis of layered oxide cathode materials for Li-ion batteries,Chemical Communications

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A versatile single molecular precursor for the synthesis of layered oxide cathode materials for Li-ion batteries
Chemical Communications ( IF 4.3 ) Pub Date : 2018-01-02 00:00:00 , DOI: 10.1039/c7cc08505b
Maofan Li _{1,

2,

3,

4,

5} , Jiajie Liu _{1,

2,

3,

4,

5} , Tongchao Liu _{1,

2,

3,

4,

5} , Mingjian Zhang _{1,

2,

3,

4,

5} , Feng Pan _{1,

2,

3,

4,

5}

Affiliation

A carbonyl-bridged single molecular precursor LiTM(acac)₃ [transition metal (TM) = cobalt/manganese/nickel (Co/Mn/Ni), acac = acetylacetone], featuring a one-dimensional chain structure, was designed and applied to achieve the layered oxide cathode materials: LiTMO₂ (TM = Ni/Mn/Co, NMC). As examples, layered oxides, primary LiCoO₂, binary LiNi_0.8Co_0.2O₂ and ternary LiNi_0.5Mn_0.3Co_0.2O₂ were successfully prepared to be used as cathode materials. When they are applied to lithium-ion batteries (LIBs), all exhibit good electrochemical performance because of their unique morphology and great uniformity of element distribution. This versatile precursor is predicted to accommodate many other metal cations, such as aluminum (Al³⁺), iron (Fe²⁺), and sodium (Na⁺), because of the flexibility of organic ligand, which not only facilitates the doping-modification of the NMC system, but also enables synthesis of Na-ion layered oxides. This opens a new direction of research for the synthesis of high-performance layered oxide cathode materials for LIBs.

中文翻译：

通用的单分子前体，用于合成锂离子电池的层状氧化物阴极材料

设计了具有一维链结构的羰基桥连单分子前体LiTM（acac）₃ [过渡金属（TM）=钴/锰/镍（Co / Mn / Ni），acac =乙酰丙酮]，并应用于获得层状氧化物阴极材料：LiTMO ₂（TM = Ni / Mn / Co，NMC）。例如，层状氧化物，初级LiCoO ₂，二元LiNi _0.8 Co _0.2 O ₂和三元LiNi _0.5 Mn _0.3 Co _0.2 O ₂已成功制备用作阴极材料。当将它们应用于锂离子电池（LIB）时，它们均具有良好的电化学性能，这是因为它们具有独特的形态和极好的元素分布均匀性。由于有机配体的柔韧性，预计这种通用的前体可容纳许多其他金属阳离子，例如铝（Al ³⁺），铁（Fe ²⁺）和钠（Na ⁺），这不仅有利于掺杂， NMC系统的改进，但也可以合成Na离子层状氧化物。这为用于LIB的高性能层状氧化物阴极材料的合成开辟了新的研究方向。

更新日期：2018-02-02

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