Yin Keshu, Zhou Dongli, Tan Kun, Li Shiji, Zhao Mengxiao, Lu Qiong, Teng Chunlin, Lu Xihong
MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-Carbon Chem & Energy Conservation of Guangdong Province, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, People's Republic of China.
Hubei Key Laboratory of Pollutant Analysis &Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, People's Republic of China.
J Colloid Interface Sci. 2023 Dec;651:929-937. doi: 10.1016/j.jcis.2023.08.035. Epub 2023 Aug 8.
It is very necessary to design a high-capacity and stable BiO anode for nickel-bismuth (Ni//Bi) batteries. In this work, a stable α- and β- phase BiO heterojunction nanocomposite (α/β - BiO) was successfully prepared via a simple "space-confined" strategy and it was used as a superior anode for nickel-bismuth (Ni//Bi) battery. The α/β-BiO obtained by using MCM-41 as a space-confined template possesses a stable structure and enhanced charge transfer capability. Such superior traits vest the designed α/β-BiO electrode with high specific capacity (235 mAh g at 1 A g), extraordinary rate performance (137 mAh g at 40 A g, and ∼58% capacity retention vs 1 A g), and excellent cyclic durability (75% capacity retention after 5000 cycles). Such performances are far superior to that of mono-phase α-BiO and β-BiO electrodes. Furthermore, an excellent Ni//Bi battery with outstanding energy density (∼155 Wh kg) and long cycle life was assembled using the obtained α/β-BiO electrode and a NiCO electrode as anode and cathode, respectively (NiCO//α/β-BiO). This work opens a new alternative strategy for the rational design of efficient electrodes for reliable aqueous rechargeable batteries.
为镍铋（Ni//Bi）电池设计一种高容量且稳定的BiO阳极非常必要。在这项工作中，通过一种简单的“空间限制”策略成功制备了一种稳定的α相和β相BiO异质结纳米复合材料（α/β - BiO），并将其用作镍铋（Ni//Bi）电池的优质阳极。以MCM - 41作为空间限制模板获得的α/β - BiO具有稳定的结构和增强的电荷转移能力。这些优异的特性赋予了所设计的α/β - BiO电极高比容量（在1 A g时为235 mAh g）、出色的倍率性能（在40 A g时为137 mAh g，相对于1 A g时容量保持率约为58%）以及优异的循环耐久性（5000次循环后容量保持率为75%）。这些性能远远优于单相α - BiO和β - BiO电极。此外，分别使用所获得的α/β - BiO电极和NiCO电极作为阳极和阴极，组装了具有出色能量密度（约155 Wh kg）和长循环寿命的优异Ni//Bi电池（NiCO//α/β - BiO）。这项工作为合理设计用于可靠水系可充电电池的高效电极开辟了一种新的替代策略。
