焦耳加热
材料科学
原位
锂(药物)
超短脉冲
硅
焦耳(编程语言)
纳米技术
光电子学
化学
电气工程
光学
复合材料
物理
工程类
内分泌学
高效能源利用
有机化学
激光器
医学
作者
Shigang Liu,Bowen Liu,Ming Liu,Jie Xiong,Yang Gao,Bin Wang,Yuan Hu
出处
期刊:Nanoscale
[The Royal Society of Chemistry]
日期:2024-01-01
卷期号:16 (5): 2531-2539
摘要
High-capacity anodes, especially silicon, suffer from huge volume fluctuations and electrode material pulverization during lithiation/delithiation. An accessible solution to this issue is to construct nano-silicon anodes with optimized particle size and a conductive matrix. In this work, we introduce a novel strategy for the in situ, rapid synthesis of ultra-small silicon nanoparticles uniformly embedded within carbonized nanosheets (us-Si/C) through swift high-temperature thermal radiative heating of sizable silicon nanoparticles (SiNPs). The us-Si/C anode shows ample capability to accommodate volume fluctuations during the lithiation/delithiation processes. The as-prepared anode exhibits a specific capacity of 920 mA h g-1 after 1000 cycles at a current density of 2 A g-1, indicating the advantages of the well-tailored structure. Additionally, the us-Si/C electrode can maintain an areal capacity of approximately 1.55 mA h cm-2 after 200 cycles at a high loading of 3.66 mg cm-2. Moreover, it presents practical applicability when assembled into LFP (lithium iron phosphate)//us-Si/C full cells. This preparation method presents great promise for achieving roll-to-roll manufacturing for practical applications due to its simplicity and efficiency.
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