Wang Jiangyan, Cui Yi, Wang Dan
State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P. R. China.
Nanoscale Horiz. 2020 Sep 1;5(9):1287-1292. doi: 10.1039/d0nh00311e. Epub 2020 Jul 31.
Hollow structures have been shown to be fruitful in addressing the cycling-stability problem of high-capacity electrode materials. However, we have noticed that there exist misconceptions toward the energy density of hollow-structured electrodes. In this Focus Article, the indispensability of hollow structures for stable high energy density batteries is discussed. Additionally, the merits of hollow multishelled structures (HoMSs) superior to their single-shelled counterparts mainly including optimizing the volumetric energy density, improving the mechanical robustness and enabling smart safe energy-storage behaviors have also been highlighted. The goal of the current article is to clarify that a HoMS-based electrode is indispensable to realize a practically high energy density in addition to lengthening the cycling lifespan and guide the future development of HoMSs to further improve the performance of rechargeable batteries.
空心结构已被证明在解决高容量电极材料的循环稳定性问题方面卓有成效。然而，我们注意到人们对空心结构电极的能量密度存在误解。在这篇聚焦文章中，讨论了空心结构对于稳定的高能量密度电池的不可或缺性。此外，还强调了空心多壳结构（HoMSs）优于其单壳对应结构的优点，主要包括优化体积能量密度、提高机械稳健性以及实现智能安全的能量存储行为。本文的目的是阐明基于HoMSs的电极对于实现实际的高能量密度以及延长循环寿命是不可或缺的，并指导HoMSs的未来发展以进一步提高可充电电池的性能。
