Three-Dimensional Carbon Framework Anchored Polyoxometalate as a High-Performance Anode for Lithium-Ion Batteries.,Chemistry - A European Journal

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Three-Dimensional Carbon Framework Anchored Polyoxometalate as a High-Performance Anode for Lithium-Ion Batteries.
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2020-04-01 , DOI: 10.1002/chem.201905764
Xueying Jia ₁ , Jiaxin Wang ₁ , Hanbin Hu ₁ , Yu-Fei Song ₁

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Recently, it has become very important to develop cost-effective anode materials for the large-scale use of lithium-ion batteries (LIBs). Polyoxometalates (POMs) have been considered as one of the most promising alternatives for LIB electrodes owing to their reversible multi-electron-transfer capacity. Herein, Keggin-type [PMo12 O40 ]3- (donated as PMo12 ) clusters are anchored onto a 3D microporous carbon framework derived from ZIF-8 through electrostatic interactions. The PMo12 clusters can be immobilized steadily and uniformly on the carbon framework, which provides enhanced electrical conductivity and high stability. Compared with PMo12 itself, the as-prepared novel 3D Carbon-PMo12 composite displays a significantly improved Li-ion storage performance as an LIB anode, with excellent reversible specific capacity and rate capacity, as well as high cycling performance (discharge capacity of 985 mA h g-1 after 200 cycles), which are superior to other POM-based anode materials reported so far. The high performance of the Carbon-PMo12 composite can be attributed to the 3D conductive network with fast electron transport, high ratio of pseudocapacitive contribution, and evenly distributed PMo12 clusters with reversible 24-electron transfer capacity. This work offers a facile way to explore novel LIB anodes consisting of electroactive molecule clusters.

中文翻译：

三维碳骨架锚定多金属氧酸盐作为锂离子电池的高性能阳极。

近来，开发用于锂离子电池（LIB）的大规模使用的经济有效的阳极材料已经变得非常重要。由于多金属氧酸盐（POM）具有可逆的多电子传输能力，因此被认为是LIB电极最有希望的替代品之一。在此，Keggin型[PMo12 O40] 3-（捐赠为PMo12）簇通过静电相互作用锚定在源自ZIF-8的3D微孔碳骨架上。PMo12簇可以稳定且均匀地固定在碳骨架上，从而提高了导电性和高稳定性。与PMo12本身相比，新制备的新型3D Carbon-PMo12复合材料作为LIB阳极显示出显着改善的锂离子存储性能，具有出色的可逆比容量和倍率容量，以及高循环性能（200次循环后的放电容量为985 mA h g-1），这优于迄今为止报道的其他基于POM的阳极材料。Carbon-PMo12复合材料的高性能归因于3D导电网络，具有快速的电子传输，高比例的伪电容贡献以及具有可逆的24电子传递能力的均匀分布的PMo12团簇。这项工作提供了一种简便的方法来探索由电活性分子簇组成的新型LIB阳极。和均匀分布的PMo12簇，具有可逆的24电子传输能力。这项工作提供了一种简便的方法来探索由电活性分子簇组成的新型LIB阳极。和均匀分布的PMo12簇，具有可逆的24电子传输能力。这项工作提供了一种简便的方法来探索由电活性分子簇组成的新型LIB阳极。

更新日期：2020-04-01

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