Simple Synthesis of K0.5VOPO4·1.5H2O/Graphene Oxide Composite as a Cathode Material for Potassium-Ion Batteries,ACS Applied Energy Materials

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Simple Synthesis of K0.5VOPO4·1.5H2O/Graphene Oxide Composite as a Cathode Material for Potassium-Ion Batteries
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-12-31 , DOI: 10.1021/acsaem.0c02354
Huanhuan Li _{1,

2} , Jiahui Dong _{1,

2} , Da Han ₁ , Junyang Hu _{1,

2} , Xiaojing Li _{1,

2} , Feiyu Kang _{1,

2} , Dengyun Zhai ₁

Affiliation

Potassium-ion batteries (PIBs) as an alternative to lithium-ion batteries have attracted much interest and develop rapidly. Among the cathode materials, polyanionic compounds present both high discharge voltage and considerable capacity owing to their unique skeleton and strong inductive effect from anion groups. In this work, a K_0.5VOPO₄·1.5H₂O/graphene oxide composite as a polyanionic cathode material for PIBs was synthesized by a simple chemical precipitation method. The composite delivers a high capacity of 118 mA h g^–1 with a competitive energy density of 402 W h kg^–1. With GO modification, the composite also shows superior cycle and rate performance. The simple synthesis process and excellent performance enable it to have commercial potential in the future.

中文翻译：

K _0.5 VOPO ₄ ·1.5H ₂ O /氧化石墨烯复合材料作为钾离子电池正极材料的简单合成

代替锂离子电池的钾离子电池（PIB）引起了人们的极大兴趣并迅速发展。在正极材料中，聚阴离子化合物由于其独特的骨架和来自阴离子基团的强诱导作用，因此具有很高的放电电压和相当大的容量。在这项工作中，通过简单的化学沉淀法合成了K _0.5 VOPO ₄ ·1.5H ₂ O /氧化石墨烯复合物作为PIBs的聚阴离子阴极材料。该复合材料可提供118 mA hg ^–1的高容量，而竞争性能量密度为402 W h kg ^–1。通过GO改性，该复合材料还显示出优异的循环和速率性能。简单的合成工艺和出色的性能使其在未来具有商业潜力。

更新日期：2021-01-25

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