At present, various strategies are utilized to improve the specific capacity of electrode materials to overcome the low energy density problem of aqueous battery, while their specific capacity is still far away from the theoretical value, especially for anode materials. Herein, we designed and synthesized nanoparticles assembled hollow hexagonal prism Bi₂O₃ (HHP Bi₂O₃) through template inducing synthesis. When used as an anode material for aqueous battery, it demonstrated a remarkable specific capacity of 327 mAh/g at 1 A/g, which reaches 94.8% of its theoretical capacity and is the highest value of its kind. Besides the high specific capacity, the as-fabricated HHP Bi₂O₃ also exhibits superior rate capability (220 mAh/g at 20 A/g) and long-term stability (∼80%, 3000 cycles). Such high performance originates from high atom utilization and fast reaction kinetics for electrochemical reaction brought by its unique structures. Notably, when the HHP Bi₂O₃ is paired with the cathode material Ni_xCo_1-x(OH)₂ to form an aqueous alkaline battery, its high electrochemical property is well exhibited. The designed HHP Bi₂O₃ with scalable synthesis process provides guidance for the preparation of other high capacity energy-storage materials, and paves the way to promote their practicality.

目前，已经采取了各种策略来提高电极材料的比容量，以克服水性电池的低能量密度问题，而它们的比容量仍远离理论值，特别是对于阳极材料。在本文中，我们设计并合成了通过模板诱导合成空心纳米六方柱Bi ₂ O ₃（HHP Bi ₂ O ₃）组装而成的纳米颗粒。当用作水性电池的负极材料时，它在1 A / g时显示出显着的327 mAh / g的比容量，达到其理论容量的94.8％，是同类产品中的最高值。除了高比容量外，预制的HHP Bi ₂ O ₃它还具有出色的速率能力（在20 A / g时为220 mAh / g）和长期稳定性（〜80％，3000次循环）。如此高的性能源于其独特的结构带来的高原子利用率和快速的电化学反应动力学。值得注意的是，当HHP Bi ₂ O ₃与阴极材料Ni _x Co _1-x（OH）₂配对以形成水性碱性电池时，其高电化学性能被充分展现。设计的具有可扩展合成工艺的HHP Bi ₂ O ₃为其他高容量储能材料的制备提供指导，并为促进其实用性铺平了道路。