Biomineralization-inspired: rapid preparation of a silicon-based composite as a high-performance lithium-ion battery anode
Biomineralization-inspired: rapid preparation of a silicon-based composite as a high-performance lithium-ion battery anode
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DOI：
10.1039/d1ta01919h
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发表时间：
2021-04-12
影响因子：
11.9
通讯作者：
Qin, Lu-Chang
中科院分区：
文献类型：
--
作者：
Gao, Runsheng;Tang, Jie;Qin, Lu-Chang
硅（Si）是下一代锂离子电池（LIB）阳极最有前途的材料之一。它不仅拥有最高的理论能力，而且拥有丰富的自然资源和相关的成熟技术。然而，其体积波动大和导电性差的问题必须通过与客体材料复合来克服。与与工业化应用背道而驰的复杂方法不同，本文采用一种简便有效的策略，在30秒内快速生物矿化制备可编辑的Si复合材料前体。经过简单的后处理，得到了高性能的碳包覆硅复合电极，该电极具有良好的电接触、结构稳定性以及良好的电解质扩散路径和空间。具体来说，这种生物矿化策略提高了硅电极的锂储存能力，具有高可逆比容量。该电极在大电流密度（4 A g(-1)）下表现出优异的倍率性能，并且在长期循环（600次循环）中表现出优异的容量保持率。这种方法还为快速合成高性能锂离子电池的多样化电极提供了新的选择。
Silicon (Si) is one of the most promising materials for the next-generation anode of lithium-ion batteries (LIBs). It not only has the highest theoretical capacity but also is rich in natural resources and related mature technologies. However, its large volume fluctuation and poor electrical conduction must be overcome by compositing it with guest materials. Different from complicated methods that run counter to industrialized applications, herein, a facile and efficient strategy has been applied to prepare an editable Si composite precursor within 30 seconds with rapid biomineralization. After simple post-processing, a high-performance carbon-coated Si composite electrode was obtained, which exhibited good electrical contact, structural stability, and favorable diffusion paths and space for electrolytes. Specifically, this biomineralization strategy improves the capability of lithium storage in the Si electrode with a high-reversible specific capacity. The electrode shows an excellent rate capability at large current density (4 A g(-1)) and excellent capacity retention in long-term cycling (600 cycles). This approach also provides a new choice to synthesize rapidly diverse electrodes for high-performance lithium-ion batteries.