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Yu Q, Liu J, Liang Y, Liu T, Zheng Y, Lai Z, Liu X, Chen J, Zhang Q, Li X. Synthesis of 3D stacked silicon nanosheets via electrochemical reduction of attapulgite in molten salt for high-performance lithium-ion batteries anode. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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3
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Liu X, Zhang Q, Zhu Y, Xu S, Zhang J, Zheng Y, Zhang L, Ma M, Rao H, Liu Z. Nanoporous germanium prepared by a mechanochemical reaction with enhanced lithium storage properties. Dalton Trans 2022; 51:3075-3080. [PMID: 35113107 DOI: 10.1039/d1dt03316f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The cost-effective and facile fabrication of nanostructured germanium for lithium-ion batteries (LIBs) remains a grand challenge. Herein, nanoporous Z-Ge was generated via a facile two-step mechanochemical-etching reaction with Mg2Ge and ZnCl2. The prepared nanoporous Ge nanoparticles, as the anode for Li-Ge half cells, showed superior LIB performance, in terms of a high capacity, good rate capability, and good long-term stability of 700 cycles. Significantly, the mechanochemical reaction was extended to produce other nanoporous Ge or Si materials such as A-Ge, Z-Si, and A-Si via the mechanochemical reaction between Mg2Ge and AlCl3, Mg2Si and ZnCl2, and Mg2Si and AlCl3.
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Affiliation(s)
- Xianyu Liu
- School of Chemical Engineering, Institute of Urban Ecology and Environment, Nanomaterials Laboratory, Lanzhou City University, Lanzhou, Gansu 730070, The People's Republic of China. .,Hefei National Laboratory for Physical Science at the Microscale, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, The People's Republic of China.
| | - Qianliang Zhang
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, and State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong 250100, The People's Republic of China
| | - Yansong Zhu
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, and State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong 250100, The People's Republic of China
| | - Shengjie Xu
- School of Applied Chemical Engineering, Lanzhou Petrochemical University of Vocational Technology, Lanzhou, Gansu 730060, The People's Republic of China
| | - Jia Zhang
- School of Applied Chemical Engineering, Lanzhou Petrochemical University of Vocational Technology, Lanzhou, Gansu 730060, The People's Republic of China
| | - Yanping Zheng
- School of Chemical Engineering, Institute of Urban Ecology and Environment, Nanomaterials Laboratory, Lanzhou City University, Lanzhou, Gansu 730070, The People's Republic of China.
| | - Lei Zhang
- School of Chemical Engineering, Institute of Urban Ecology and Environment, Nanomaterials Laboratory, Lanzhou City University, Lanzhou, Gansu 730070, The People's Republic of China.
| | - Mingguang Ma
- School of Chemical Engineering, Institute of Urban Ecology and Environment, Nanomaterials Laboratory, Lanzhou City University, Lanzhou, Gansu 730070, The People's Republic of China.
| | - Honghong Rao
- School of Chemical Engineering, Institute of Urban Ecology and Environment, Nanomaterials Laboratory, Lanzhou City University, Lanzhou, Gansu 730070, The People's Republic of China.
| | - Zheng Liu
- School of Chemical Engineering, Institute of Urban Ecology and Environment, Nanomaterials Laboratory, Lanzhou City University, Lanzhou, Gansu 730070, The People's Republic of China.
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Gao J, Hao Y, Xu S, Rong X, Lu Q, Zhu C, Hu YS. A symmetric sodium-ion battery based on P2-Na0.67[ZnMn1-]O2 as both positive and negative electrode materials. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.139421] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Chen D, Tao C, Chen T, Liu X, Liu Y, Xu G, Han G. Pomegranate-like silicon-based anodes self-assembled by hollow-structured Si/void@C nanoparticles for Li-ion batteries with high performances. NANOTECHNOLOGY 2021; 32:095402. [PMID: 33157543 DOI: 10.1088/1361-6528/abc84e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Silicon is considered as one of the most promising alternatives to the graphite anode for lithium-ion batteries due to its high theoretical capacity (4200 mAh g-1). However, its fragile solid electrolyte interphase cannot tolerate the large volume changes of bare silicon induced by the lithium insertion and extraction, resulting in low Coulombic efficiency. In previous reports, a yolk-shell design, such as Si@void@C, in which the well-defined space allows the silicon particles to expand freely without breaking the outer carbon shells, can effectively improve the Columbic efficiency. Here, we design a pomegranate-like silicon-based anodes self-assembled by the hollow-structured Si/void@C nanoparticles, in which silicon and some voids are together sealed in the outer carbon shells, by the magnesiothermic reduction of the colloidal SiO2@PEI nanospheres prepared by the hydrolysis of the tetraethoxysilane under the catalytic effect of polyetherimide (PEI). Due to the tolerance of the presealed void in the carbon shells of the primary hollow-structured Si/void@C nanoparticles, the prepared pomegranate-like silicon-based anodes deliver a high reversible capacity of 1615 mAh g-1 at 0.1 C and long cycle life of 73.5% capacity retention at 2 C after 500 cycles, as well as high Coulombic efficiency of 99%.
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Affiliation(s)
- Dajin Chen
- State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - Chuanying Tao
- State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - Tongzhou Chen
- State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - Xiaohan Liu
- State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - Yong Liu
- State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - Gang Xu
- State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - Gaorong Han
- State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
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Sparschu W, Larsen R, Katsoulis D. Direct Synthesis of Methyl Chlorosilanes from Pd-Mg-SiO 2 Substrates Using Mechanochemistry. Macromol Rapid Commun 2021; 42:e2000684. [PMID: 33599021 DOI: 10.1002/marc.202000684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 12/07/2020] [Indexed: 11/08/2022]
Abstract
The direct reaction of methyl chloride with magnesium and palladium infused silica substrates to synthesize methyl chlorosilanes is reported. First, high energy ball milling on solid Mg-SiO2 mixtures produces elemental silicon and MgO. When PdCl2 is infused into the mixture, after additional ball milling and high-temperature reduction under H2 , dipalladium silicide (Pd2 Si) is produced. The silicon of the Pd2 Si readily reacts with MeCl under Müller-Rochow reaction conditions, to produce methyl chlorosilanes at yield ratios analogous to those of the traditional process. The dominant product is Me2 SiCl2 (selectivity > 30%), followed by MeSiCl3 and Me3 SiCl, with minor amounts of the remaining chlorosilanes. Silicon conversion exceeds 20% for most of the substrates. The elemental palladium, which remains within the Pd-Mg-SiO2 contact mass is re-converted to Pd2 Si at the next H2 /high-temperature treatment and reacts again with MeCl to repeat the methyl chlorosilane production. In principle, the resulting cycle of the mechanochemically induced formation of Pd2 Si followed by the reaction with MeCl can be repeated until the starting SiO2 converts completely to methyl chlorosilanes.
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Affiliation(s)
- Wendy Sparschu
- Dow Silicones Corporation, 2200 W. Salzburg Rd, Auburn, MI, 49811, USA
| | - Robert Larsen
- Dow Silicones Corporation, 2200 W. Salzburg Rd, Auburn, MI, 49811, USA
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Feng Y, Liu L, Liu X, Teng Y, Li Y, Guo Y, Zhu Y, Wang X, Chao Y. Enabling the ability of Li storage at high rate as anodes by utilizing natural rice husks-based hierarchically porous SiO2/N-doped carbon composites. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136933] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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