With the continuing demand for the minimization of electrochemical energy storage devices, the volumetric performance has become equally important as the gravimetric metrics for rechargeable batteries used in limited spaces. High-capacity anode materials promise to significantly improve the volumetric performance of lithium-ion batteries, but the issues of nanosizing and mechanical instability induced by their large volume changes during cycling generally prevent their practical use. In this Perspective, we focus on the importance of mechanical stability designs and highlight internal densification as an ideal solution for the large-volume-change anode nanomaterials to achieve both good gravimetric and volumetric performance. We discuss the strategies based on the use of carbons in high-density material construction, precise void preservation, and stress management to address the mechanical instability issues in terms of materials, electrodes, and devices. Finally, future ways of solving these issues with compact lithium storage are suggested.

中文翻译：

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通过紧凑且机械稳定的阳极设计实现高容量锂存储

随着对最小化电化学能量存储装置的持续需求，体积性能已经变得与用于有限空间中的可再充电电池的重量度量同样重要。高容量的负极材料有望显着改善锂离子电池的体积性能，但是由于其在循环过程中的大体积变化而引起的纳米尺寸和机械不稳定性问题通常会阻止其实际使用。在此观点中，我们将重点放在机械稳定性设计的重要性上，并强调内部致密化作为大体积变化阳极纳米材料实现理想重量和体积性能的理想解决方案。我们讨论了基于在高密度材料构造中使用碳，精确地保留空隙，应力管理以解决材料，电极和设备方面的机械不稳定性问题。最后，提出了使用紧凑型锂电池解决这些问题的未来方法。