4.6 Article

A simple method to fabricate size and porosity tunable Si by Al-Si alloy as lithium ion battery anode material

期刊

ELECTROCHIMICA ACTA
卷 345, 期 -, 页码 -

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2020.136242

关键词

Si anode; Acid etching; Ball-milling; Al-Si alloy Ingot; Lithium ion battery

资金

  1. National Natural Science Foundation of China [51874272, 51804294, 11575253]
  2. Anhui Provincial key research and development plan [1704a0902017]
  3. Anhui Provincial Natural Science Foundation [1808085ME121, 1608085J03]
  4. State Key Laboratory of Pollution Control and Resource Reuse Foundation [PCRRF18017]
  5. Key Laboratory of Photovoltaic and Energy Conservation Materials, Chinese Academy of Sciences [PECL2019ZD005, PECL2018QN002, PECL2018QN005]
  6. CPSF - CAS Joint Foundation for Excellent Postdoctoral Fellows [2016LH0017]
  7. State Key Laboratory of Refractories and Metallurgy (Wuhan University of Science and Technology) [G201910]
  8. CASHIPS Director's Funds [YYJJ201624]
  9. International Clean Energy Talent Program by China Scholarship Council [201904100013, 201902720003]

向作者/读者索取更多资源

Many research works demonstrate that an appropriate size and porosity of Si can effectively alleviate the problem of large volume change. Although there are many methods to tune the size and porosity of Si, high cost and complicated processes hinder them from a large-scale application. Here a simple method is developed by ball milling and acid etching Al-Si alloy ingots with high Si contents. The porosity and size distribution of the obtained porous Si (P-Si) can be tuned effectively by adjusting the Si content in the Al-Si alloy. As a result, with Si content of 50 wt% in the Al-Si alloy ingot, P-Si-50 presents relatively small and uniform particle size distribution, and the largest pore volume. After carbon coated, the obtained P-Si-50/C maintains a reversible capacity of 1226 mAh g(-1) after 200 cycles at a 0.2C current density. The method might provide a significant scientific contribution to further understanding of P-Si synthesized by the AleSi alloy and guidelines for structure optimization of the P-Si for advanced lithium ion battery applications. (c) 2020 Elsevier Ltd. All rights reserved.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据