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Boosting Zinc-Ion Storage Capability by Effectively Suppressing Vanadium Dissolution Based on Robust Layered Barium Vanadate
Nano Letters ( IF 9.6 ) Pub Date : 2020-03-17 , DOI: 10.1021/acs.nanolett.0c00732 Xiao Wang 1, 2 , Baojuan Xi 1 , Xiaojian Ma 1 , Zhenyu Feng 1 , Yuxi Jia 2 , Jinkui Feng 2 , Yitai Qian 1, 3 , Shenglin Xiong 1
Nano Letters ( IF 9.6 ) Pub Date : 2020-03-17 , DOI: 10.1021/acs.nanolett.0c00732 Xiao Wang 1, 2 , Baojuan Xi 1 , Xiaojian Ma 1 , Zhenyu Feng 1 , Yuxi Jia 2 , Jinkui Feng 2 , Yitai Qian 1, 3 , Shenglin Xiong 1
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Vanadium-based compounds with an open framework structure have become the subject of much recent investigation into aqueous zinc-ion batteries (AZIBs) due to high specific capacity. However, there are some issues with vanadium dissolution from a cathode framework as well as the generation of byproducts during discharge that should not be ignored, which could cause severe capacity deterioration and inadequate cycle life. Herein, we report several barium vanadate nanobelt cathodes constructed of two sorts of architectures, i.e., Ba1.2V6O16·3H2O and BaV6O16·3H2O (V3O8-type) and BaxV2O5·nH2O (V2O5-type), which are controllably synthesized by tuning the amount of barium precursor. Benefiting from the robust architecture, layered BaxV3O8-type nanobelts (Ba1.2V6O16·3H2O) exhibit superior rate capability and long-term cyclability owing to fast zinc-ion kinetics, enabled by efficiently suppressing cathode dissolution as well as greatly eliminating the generation of byproduct Zn4SO4(OH)6·xH2O, which provides a reasonable strategy to engineer cathode materials with robust architectures to improve the electrochemical performance of AZIBs.
中文翻译：
通过有效抑制基于稳健的层状钒酸钡的钒溶解来提高锌离子的储存能力
具有开放骨架结构的钒基化合物由于其高比容量而成为水锌离子电池（AZIBs）的最新研究对象。但是，钒从阴极骨架中溶出以及放电过程中副产物的产生存在一些不容忽视的问题，这可能导致严重的容量下降和循环寿命不足。在此，我们报道了几种由两种结构构成的钒酸钡纳米带阴极，即Ba 1.2 V 6 O 16 ·3H 2 O和BaV 6 O 16 ·3H 2 O（V 3 O 8型）和Ba x V2 O 5 · n H 2 O（V 2 O 5型），通过调节钡前体的量可控制地合成。得益于强大的体系结构，层状Ba x V 3 O 8型纳米带（Ba 1.2 V 6 O 16 ·3H 2 O）由于具有快速的锌离子动力学特性，因此具有优异的速率能力和长期可循环性，可通过有效抑制阴极来实现溶解并大大消除了副产物Zn 4 SO 4（OH）6 · x H的产生2 O，这提供了一种合理的策略来设计具有坚固结构的阴极材料，以改善AZIBs的电化学性能。
更新日期：2020-04-24
中文翻译：
通过有效抑制基于稳健的层状钒酸钡的钒溶解来提高锌离子的储存能力
具有开放骨架结构的钒基化合物由于其高比容量而成为水锌离子电池（AZIBs）的最新研究对象。但是，钒从阴极骨架中溶出以及放电过程中副产物的产生存在一些不容忽视的问题，这可能导致严重的容量下降和循环寿命不足。在此，我们报道了几种由两种结构构成的钒酸钡纳米带阴极，即Ba 1.2 V 6 O 16 ·3H 2 O和BaV 6 O 16 ·3H 2 O（V 3 O 8型）和Ba x V2 O 5 · n H 2 O（V 2 O 5型），通过调节钡前体的量可控制地合成。得益于强大的体系结构，层状Ba x V 3 O 8型纳米带（Ba 1.2 V 6 O 16 ·3H 2 O）由于具有快速的锌离子动力学特性，因此具有优异的速率能力和长期可循环性，可通过有效抑制阴极来实现溶解并大大消除了副产物Zn 4 SO 4（OH）6 · x H的产生2 O，这提供了一种合理的策略来设计具有坚固结构的阴极材料，以改善AZIBs的电化学性能。
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