Article
Electrochemistry
Tianxiang Yuan, Renheng Tang, Fangming Xiao, Shiyong Zuo, Ying Wang, Jiangwen Liu
Summary: The silicon suboxide (SiO) anode material shows promise for Lithium-ion batteries (LIBs) due to its high theoretical capacity, but it faces challenges such as large volume change (200%), low electrical conductivity, and low first Coulombic efficiency. A ternary composite ((SiOx/G/SnO2)@C) with a carbon coating layer is developed to address these issues, where graphite as part of the active materials improves Coulombic efficiency and controls volume change, and the carbon coating layer is designed to further restrain the high-volume change of SiOx. With the presence of SnO2, the composite exhibits improved electrochemical performance. Experimental results show that (SiOx/G/SnO2)@C achieves a first charging capacity of 382.6 mAh g(-1) at a current density of 100 mA g(-1), with the Coulombic efficiency improved from 62.2% to 74.9%. After 110 cycles, the capacity reaches 424.6 mAh g(-1) and the capacity retention rate is 103.9%.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Jizhe Wu, Chenxin Jin, Guojun Xu, Huaide Chen, Bin Lu, Xiaomin Li, Fugen Sun, Lang Zhou, Zhihao Yue
Summary: In this study, cuprous oxide and carbon coated silicon monoxide (SiOx/C/Cu2O) composites were synthesized by high temperature heat treatment. The carbon acts as a buffer for the volume expansion during lithium intercalation, enhances the material's conductivity, and reduces the contact between the electrolyte and the active substance. Cu2O further reduces the contact between the electrolyte and the active substance, buffering the change of electrode structure and improving the overall cycling performance.
SOLID STATE IONICS
(2023)
Article
Materials Science, Ceramics
Zhaozhe Yu, Kangzhe Yu, Jiuxing Wei, Quan Lu, Yan Cheng, Zhiliang Pan
Summary: This study coated germanium on silicon monoxide anode using magnetron sputtering technique, improving the conductivity and cycling performance of the anode.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Shuai Xu, Xiaodong Hou, Dongniu Wang, Lucia Zuin, Jigang Zhou, Yong Hou, Michael Mann
Summary: In this study, the structure and composition evolution of SiO and graphene-coated SiO under different heat treatment conditions were investigated, revealing the structural transition of SiO during heat treatment and the improved electrochemical performance by graphene coating.
ADVANCED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Xuli Ding, Hongda Zhao, Daowei Liang, Pengfei He
Summary: A novel strategy for preparing a ternary SiO@Pc@Ge composite has been developed, showing superior electrochemical performance and excellent cycling stability. XPS and CV investigations reveal the phase evolution and Li storage mechanism during charge-discharge processes, with enhanced Li-ion kinetics in the optimized samples.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Li Wang, Qiwei Tang, Changfeng Zhao, Shuai Zhang, Haijing Zhao
Summary: SiO/carbon composite with network-liked carbon coating layer was prepared using a two-step spray-drying and subsequent pyrolysis method. This structure not only effectively prolongs the cycle performance but also greatly improves the rate capability. The obtained composite shows a reversible capacity of 1119.4mAh.g(-1) after 100 cycles at a current density of 200 mA.g(-1). Increasing the current densities to 500 mA.g(-1) and 1000 mA.g(-1), the capacity can still maintain at 887.2mAh.g(-1) and 577.7mAh.g(-1), respectively, indicating the network-liked carbon coated SiO reported in this paper is a promising anode material for lithium-ion batteries.
Article
Electrochemistry
Jaeyun Ha, Heonsoo Park, Moonsu Kim, Yong-Tae Kim, Jinsub Choi
Summary: In this study, a method for coating SiO with a vertically grown carbon layer using low-cost liquefied natural gas was reported. The carbon-coated samples obtained using LNG showed similar physical and chemical properties to those obtained using high-purity CH4, and exhibited superior electrochemical performances compared to pristine SiO.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Inorganic & Nuclear
Qianliang Zhang, Baojuan Xi, Shenglin Xiong, Yitai Qian
Summary: SiO based materials have been developed with carbon coated SiO nanoparticles embedded in N-doped carbon nanosheets, showing excellent volume expansion suppression. The material exhibits stable reversible capacity and good rate performance at high cycle numbers, demonstrating potential as a promising anode for high capacity LIBs.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Zhihao Huang, Guoju Dang, Wenping Jiang, Yuanyu Sun, Meng Yu, Quansheng Zhang, Jingying Xie
Summary: Silicon monoxide (SiO) is a promising alternative anode material due to its high theoretical capacity, operating voltage, and low cost, but faces challenges such as volume change and poor electrical conductivity. By coating SiO with a carbon layer using polyvinyl pyrrolidone (PVP) as a carbon source, the composite material shows improved electrochemical performance, high capacity retention, and cycling stability. High-resolution transmission electron microscopy (HRTEM) and Raman spectra confirm the presence of an amorphous carbon layer on SiO's surface.
Article
Chemistry, Physical
Tomotaro Mae, Kentaro Kaneko, Mochen Li, Suguru Noda
Summary: A lightweight, high-capacity negative electrode was developed using carbon-coated silicon monoxide particles suspended in a carbon nanotube matrix, without the use of metal foils or polymeric binders. The electrode achieved high initial delithiation capacities and demonstrated reversible expansion/shrinkage during lithiation/delithiation. The successful development of this electrode offers promising potential for high-performance energy storage devices.
Article
Chemistry, Physical
Tong-Hyun Kang, Byong-June Lee, Chaesung Lim, Ha-Young Lee, Jeong Woo Han, Jong-Sung Yu
Summary: The study presents a unique titanium oxide composite material with a high reversible capacity and stable charge-discharge performance. The material exhibits ultrafast charging at a high current density and stable operation over a wider potential window.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Yanchen Ma, Aoming Huang, Yan Li, Hongcheng Jiang, Wen Zhang, Li Zhang, Linlin Li, Shengjie Peng
Summary: The study introduces the preparation of Si/N-doped carbon composite anode materials using recycled Si waste from the photovoltaic industry. The coating of Si micro/nano-plates with N-doped carbon facilitates electron transfer, inhibits volume expansion, and enhances the stability of the composites. This approach shows promising results in terms of high discharge capacity and cycling performance for the next generation of LIBs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Zhaolin Li, Hailei Zhao, Xin Tao, Yaozong Yang, Jie Wang, Zhao Yang
Summary: In this study, a graphene-modified lithium silicate (LS) nanodots decorated SiOx-C material was prepared using a sol-gel approach and subsequent heat treatment. The material exhibited fast Li-ion and electron transport, enhancing the electrode reaction kinetics of SiOx. The highly-conductive network of graphene also mitigated the structural stress of SiOx, resulting in excellent structural durability. The electrode showed a reversible capacity of 400 mAh g-1 at 0.5 A g-1 for 200 cycles without obvious capacity degradation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Damian Pandel, Julian Neises, Stefan O. Kilian, Hartmut Wiggers, Niels Benson
Summary: Researchers have found that using vertically aligned carbon nanotubes as an electrically conductive scaffolding, combined with silicon nanoparticles as anode active material, can improve the capacity, rate capability, and cycling stability of lithium-ion batteries.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Jannes Mueller, Mozaffar Abdollahifar, Stefan Doose, Peter Michalowski, Nae-Lih Wu, Arno Kwade
Summary: This study scaled up the production process of silicon/graphite composites and investigated the effects of carbon coating and calendering on the particle level. The study found that carbon coating reduces surface area, stabilizes the composite, and enhances electrical conductivity. The electrochemical performance of the composites showed improved capacity retention with carbon coating, especially after calendering.
JOURNAL OF POWER SOURCES
(2022)
Article
Materials Science, Multidisciplinary
Tian Xie, Fugen Sun, Xiaoqing Zhou, Li Liu, Zhenyuan Liu, Liekai Liu, Zilong Wu, Zhihao Yue, Lang Zhou, Hao Tang
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2018)
Article
Engineering, Electrical & Electronic
Hao Tang, Xin Jin, Long Tan, Liekai Liu, Runguang Sun
Summary: The study demonstrates that thermal treatment of commercial Si flakes can significantly enhance the performance of lithium-ion batteries, achieving high capacity and improved initial coulombic efficiency. Under the N-2 atmosphere, limited oxidation reaction between the Si flakes and oxygen generates a SiOx layer, which helps suppress volume expansion during Li+ insertion/deinsertion process.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
