A nickel and cobalt bimetal organic framework with high capacity as an anode material for lithium-ion batteries,Sustainable Energy & Fuels

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A nickel and cobalt bimetal organic framework with high capacity as an anode material for lithium-ion batteries
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2020-09-16 , DOI: 10.1039/d0se00983k
Wen Zheng _{1,

2,

3,

4,

5} , Wanying Bi _{1,

2,

3,

4,

5} , Xuenong Gao _{1,

2,

3,

4,

5} , Zhengguo Zhang _{1,

2,

3,

4} , Wenhui Yuan _{1,

2,

3,

4,

5} , Li Li _{2,

4,

5,

6,

7}

Affiliation

Owing to the high controllability and regular pore structure, metal–organic frameworks (MOFs) have been considered as promising electrode materials. In this work, we report the synthesis of a nickel and cobalt 1,3,5-benzenetricarboxylate bimetal organic framework (Ni–Co-BTC) using a common solvothermal method, and investigate its electrochemical performance as an anode material for lithium-ion batteries. The Ni–Co-BTC anode shows a high specific capacity of 1242 mA h g⁻¹ at a current density of 200 mA g⁻¹ in the potential window of 0.01–3.0 V versus Li/Li⁺ along with excellent rate performance (384 mA h g⁻¹ at a current density of 4 A g⁻¹), which could be ascribed to the conjugated carboxylates with a stronger π–π interaction and the synergistic effect of two cations. In addition, the mechanism of Li storage demonstrated that Li⁺ inserts into (or extracts from) the carboxylate groups and the benzene ring without the direct engagement of metal ions during galvanostatic charge–discharge measurements. More importantly, the Ni–Co-BTC MOF will be regarded as one of the promising anode materials for advanced Li storage.

中文翻译：

具有高容量的镍和钴双金属有机骨架作为锂离子电池的负极材料

由于高度可控性和规则的孔结构，金属有机骨架（MOF）被认为是很有前途的电极材料。在这项工作中，我们报告了使用常规溶剂热法合成镍和钴1,3,5-苯三羧酸双金属钴有机骨架（Ni–Co-BTC），并研究了其作为锂离子电池负极材料的电化学性能。Ni–Co-BTC阳极在0.01–3.0 V的电位窗口（相对于Li / Li ^+）具有200 mA g ^-1的电流密度下，在200 mA g ^-1的电流密度下显示出1242 mA hg ^-1的高比容量，以及出色的倍率性能（384 mA hg ^-1在4 A g ^-1的电流密度下），这可以归因于具有更强π-π相互作用和两个阳离子的协同作用的共轭羧酸盐。此外，锂的储存机理表明，在恒电流充放电测量过程中，Li ⁺插入羧酸根和苯环中（或从中提取），而没有金属离子的直接参与。更重要的是，Ni-Co-BTC MOF将被视为高级锂存储的有前途的阳极材料之一。

更新日期：2020-10-02

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