Shi Mangmang, Zhao Mingshu, Zheng Qingyang, Jiao Lidong, Su Zhou, Li Min, Zhao Xiaobo, Song Xiaoping, Yang Sen
School of Physics, MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, Key Laboratory of Shaanxi for Advanced Functional Materials and Mesoscopic Physics, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China.
Xi'an High-Tech Research Institute, 710025 Xi'an, China.
Dalton Trans. 2022 Aug 16;51(32):12114-12124. doi: 10.1039/d2dt01217k.
Aqueous alkaline batteries (AABs) with the merits of both high energy density and power density have emerged as one of the most promising candidates for the new generation of energy storage devices, while their practical applications are still limited by the lack of high-performance electrode materials, especially for the anode materials. Herein, metallic bismuth-bismuth oxide nanoparticles (Bi-BiO), with numerous heterogeneous interfaces, are successfully anchored and uniformly distributed on reduced graphene oxide (rGO) sheets. When Bi-BiO/rGO-20 electrode is used as the anode material for an AAB, it shows a high specific capacity of 288.0 mA h g (1036.9 F g) at 1 A g and good rate capability (74.7% of capacity retention ratio at 20 A g). Additionally, in order to match well with a Bi-BiO/rGO-20 anode, CoVS thin sheets decorated with Ni-Co layered double hydroxide sheets (NiCo-LDH) were successfully constructed a facile multistep hydrothermal method and a subsequent electrodeposition process. The resulting cathode exhibits a high specific capacity of 306.0 mA h g (2448 F g) at 1 A g. The assembled CoVS@NiCo-LDH//Bi-BiO/rGO-20 AAB delivers an outstanding energy density of 106.1 Wh kg at a power density of 789.6 W kg. Besides, the as-synthesized Bi-based electrode is also used in aqueous Zn alkaline batteries to further extend its application and the assembled Bi-BiO/rGO-20//Zn batteries possess an ultralong flat discharge plateau and exhibit a specific capacity of 250.6 mA h g at 1 A g. The results demonstrate that the as-assembled AAB has huge potential for practical applications and provides an inspiration for the next-generation energy storage devices.
具有高能量密度和功率密度优点的水系碱性电池（AABs）已成为新一代储能设备中最有前途的候选者之一，然而其实际应用仍受到高性能电极材料缺乏的限制，尤其是阳极材料。在此，具有大量异质界面的金属铋 - 铋氧化物纳米颗粒（Bi - BiO）成功地锚定并均匀分布在还原氧化石墨烯（rGO）片上。当Bi - BiO/rGO - 20电极用作AAB的阳极材料时，在1 A g下显示出288.0 mA h g（1036.9 F g）的高比容量和良好的倍率性能（在20 A g下容量保持率为74.7%）。此外，为了与Bi - BiO/rGO - 20阳极良好匹配，通过简便的多步水热法和随后的电沉积过程成功构建了装饰有镍 - 钴层状双氢氧化物片（NiCo - LDH）的CoVS薄片。所得阴极在1 A g下具有306.0 mA h g（2448 F g）的高比容量。组装的CoVS@NiCo - LDH//Bi - BiO/rGO - 20 AAB在功率密度为789.6 W kg时提供了106.1 Wh kg的出色能量密度。此外，合成的铋基电极还用于水系锌碱性电池以进一步扩展其应用，组装的Bi - BiO/rGO - 20//Zn电池具有超长的平坦放电平台，在1 A g下显示出250.6 mA h g的比容量。结果表明，组装的AAB在实际应用中具有巨大潜力，并为下一代储能设备提供了灵感。
