Efficient Fabrication of High-Capacity Silicon Composite Anodes for All-Solid-State Lithium-Ion Batteries

IF 9.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2025-03-03 DOI:10.1021/acsmaterialslett.5c0006810.1021/acsmaterialslett.5c00068

Do-Hyeon Kim, Sung-Hwan Noh, Yoon-Cheol Ha, Do Geun Lee, Joong Tark Han*, Jeong-Hee Choi* and Cheol-Min Park*,

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Abstract

Silicon is a promising anode material for all-solid-state Li-ion batteries (ASSLIBs), due to its high capacity; however, it suffers from considerable volume expansion (>300%) during cycling, resulting in poor capacity retention, low areal capacities, and low rate capabilities. To address these issues, we propose a μSi/SWCNT/LPSCl composite that effectively coats micrometer-sized Si (μSi) particles with Li₆PS₅Cl and single-walled carbon nanotubes (SWCNTs). This composite improved electrical and ionic conductivities, suppressed interface decomposition between μSi and the Li₆PS₅Cl solid electrolyte during cycling, and mitigated volume expansion to prevent cracks and contact loss. The μSi/SWCNT/LPSCl anode shows a high initial capacity (2974 mAh g^–1 at a 0.1 C rate) and stable retention for 400 cycles. Furthermore, a full cell with this anode and a LiNi_0.8Co_0.1Mn_0.1O₂ cathode exhibited excellent reversibility and stable cycling performance. We anticipate this study will provide a solution for high-performance Si-based anodes in ASSLIBs.

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全固态锂离子电池用高容量硅复合阳极的高效制备

硅因其高容量而成为全固态锂离子电池（asslib）极有前途的负极材料；然而，在循环过程中，它受到相当大的容量膨胀（>300%）的影响，导致容量保持能力差、面积容量低和速率能力低。为了解决这些问题，我们提出了一种μSi/SWCNT/LPSCl复合材料，该复合材料有效地将微米尺寸的Si （μSi）颗粒包裹在Li6PS5Cl和单壁碳纳米管（SWCNTs）上。该复合材料提高了μSi和Li6PS5Cl固体电解质的电导率和离子电导率，抑制了循环过程中μSi与Li6PS5Cl固体电解质之间的界面分解，减轻了体积膨胀，防止了裂纹和接触损失。μSi/SWCNT/LPSCl阳极具有高初始容量（0.1 C速率下2974 mAh g-1）和400次循环的稳定保持。此外，使用该阳极和LiNi0.8Co0.1Mn0.1O2阴极的电池具有优异的可逆性和稳定的循环性能。我们预计这项研究将为asslib中高性能si基阳极提供解决方案。

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.