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A Layered Zn0.4VOPO4·0.8H2O Cathode for Robust and Stable Zn Ion Storage
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-04-01 00:00:00 , DOI: 10.1021/acsaem.0c00318 Zeyi Wu 1 , Yanan Wang 1 , Lin Zhang 1 , Le Jiang 1 , Wenchao Tian 1 , Cailing Cai 1 , Jason Price 2 , Qinfen Gu 2 , Linfeng Hu 1
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-04-01 00:00:00 , DOI: 10.1021/acsaem.0c00318 Zeyi Wu 1 , Yanan Wang 1 , Lin Zhang 1 , Le Jiang 1 , Wenchao Tian 1 , Cailing Cai 1 , Jason Price 2 , Qinfen Gu 2 , Linfeng Hu 1
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Rechargeable aqueous zinc-ion batteries (ZIBs) have shown extraordinary potential in recent years due to their prominent superiority including resource sustainability, nontoxicity, excellent energy density of the zinc anode, and better safety. Nevertheless, the development of ZIBs is still hindered by the lack of suitable cathode materials possessing a high discharge voltage, sufficient specific energy density, and long-term cycle life. Herein, our work reported a layered phosphate, Zn0.4VOPO4·0.8H2O, by topochemical incorporation of zinc ions into the VOPO4·2H2O framework. The incorporation of zinc ions makes no change in the in-plane atomic arrangement and coordination environment. The resulting Zn0.4VOPO4·0.8H2O depicted a specific capacity of 161.4 mAh·g–1, a discharge plateau of 1.45 V, and excellent cycling stability over 1000 cycles. The energy density of our Zn//Zn0.4VOPO4·0.8H2O battery was as high as 219.8 Wh·kg–1 at a power density of 136.2 W·kg–1. A typical zinc ion intercalation/deintercalation mechanism has been revealed in this layered cathode. This work provides a layered hydrated phosphate as a robust cathode for ZIBs and also sheds light on modulation of multivalent-ion storage performance by a topochemical strategy in layered materials.
中文翻译：
层状Zn 0.4 VOPO 4 ·0.8H 2 O阴极，用于稳定稳定地存储锌离子
近年来，由于其优越的优势，包括资源可持续性，无毒性，锌阳极的出色能量密度以及更高的安全性，可充电水性锌离子电池（ZIB）展现出了巨大的潜力。然而，由于缺乏合适的具有高放电电压，足够的比能量密度和长期循环寿命的阴极材料，仍然阻碍了ZIBs的发展。这里，我们的工作报告的层状磷酸盐，锌0.4 VOPO 4 ·0.8H 2 O，通过锌离子的局部化学掺入VOPO 4 ·2H 2 O框架。锌离子的结合不会改变面内原子排列和配位环境。生成的锌0.4 VOPO 4 ·0.8H 2 O的比容量为161.4 mAh·g –1，放电平稳度为1.45 V，在1000次循环中具有出色的循环稳定性。我们的Zn // Zn中的能量密度0.4 VOPO 4 ·0.8H 2 O电池高达219.8瓦公斤· -1在136.2·W·公斤的功率密度-1。在该层状阴极中已揭示出典型的锌离子嵌入/脱嵌机理。这项工作提供了一种分层的水合磷酸盐作为ZIBs的坚固阴极，还阐明了通过拓扑化学方法对分层材料中多价离子存储性能的调节。
更新日期：2020-04-01
中文翻译：
层状Zn 0.4 VOPO 4 ·0.8H 2 O阴极，用于稳定稳定地存储锌离子
近年来，由于其优越的优势，包括资源可持续性，无毒性，锌阳极的出色能量密度以及更高的安全性，可充电水性锌离子电池（ZIB）展现出了巨大的潜力。然而，由于缺乏合适的具有高放电电压，足够的比能量密度和长期循环寿命的阴极材料，仍然阻碍了ZIBs的发展。这里，我们的工作报告的层状磷酸盐，锌0.4 VOPO 4 ·0.8H 2 O，通过锌离子的局部化学掺入VOPO 4 ·2H 2 O框架。锌离子的结合不会改变面内原子排列和配位环境。生成的锌0.4 VOPO 4 ·0.8H 2 O的比容量为161.4 mAh·g –1，放电平稳度为1.45 V，在1000次循环中具有出色的循环稳定性。我们的Zn // Zn中的能量密度0.4 VOPO 4 ·0.8H 2 O电池高达219.8瓦公斤· -1在136.2·W·公斤的功率密度-1。在该层状阴极中已揭示出典型的锌离子嵌入/脱嵌机理。这项工作提供了一种分层的水合磷酸盐作为ZIBs的坚固阴极，还阐明了通过拓扑化学方法对分层材料中多价离子存储性能的调节。
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