The lithium ferrous silicate (Li2FeSiO4) has high theoretical capacity of 330 mAh/g, abundant raw material resources, stable working voltage, excellent thermal stability of Si-O bond, environmental protection and low cost, and has become one of the attractive cathode materials in high-energy lithium batteries. However, the conductivity of Li2FeSiO4 material itself is poor, and the ionic conductivity is low, so improving the conductivity and Li+ diffusion coefficient of the material has become the focus of research. In this paper, Li2FeSiO4 material was synthesized by the combination of sol-gel method and solid-state sintering method, and the nano-material and metal ion doping were realized by liquid-phase grinding method, which increased the specific surface area and conductivity of the material and increased the specific energy of the material. XRD, TGDSC, particle size analysis and electrochemical capacity test show that the specific capacity of the initial Li2FeSiO4 material synthesized in solid phase is 120 mAh/g, and the capacity of the nano-treated Li2FeSiO4 material reaches 140mah/g; The Li2Fe0.5Mn0.5SiO4 material obtained by Mn doping has a capacity of 160mah/g; The volume of Li2Fe0.5Mn0.45Ti0.05SiO4 synthesized by adding metal Ti is increased to 195mah/g; The electrical conductivity of Li2Fe0.5Mn0.5Si0.975V0.025O4+C synthesized by doping v and c can be significantly improved, and the discharge capacity can reach about 200mAh/g. In the liquid phase grinding of the mixture of ethanol and acetone, it was found that the tautomers of alcohol and ketone were in the dynamic equilibrium of ketone and enol, and acetone met positively charged metal ions to form stable metal salts, which improved the stability of the material.
Published in | Advances in Materials (Volume 11, Issue 1) |
DOI | 10.11648/j.am.20221101.13 |
Page(s) | 20-29 |
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Lithium Ferrous Silicate, Solid Phase Synthesis, Nanocrystallization, Liquid Phase Grinding, Ketoenolic Dynamic Equilibrium, Metal Ion Doping
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APA Style
Wang Qingsheng, Pavel Novikov, Anadoli Popovich, Yang Zhelong, Yu Yao, et al. (2022). Studies on Synthesis and Electrochemical Properties of Lithium Ferrous Silicate Cathode Materials. Advances in Materials, 11(1), 20-29. https://doi.org/10.11648/j.am.20221101.13
ACS Style
Wang Qingsheng; Pavel Novikov; Anadoli Popovich; Yang Zhelong; Yu Yao, et al. Studies on Synthesis and Electrochemical Properties of Lithium Ferrous Silicate Cathode Materials. Adv. Mater. 2022, 11(1), 20-29. doi: 10.11648/j.am.20221101.13
AMA Style
Wang Qingsheng, Pavel Novikov, Anadoli Popovich, Yang Zhelong, Yu Yao, et al. Studies on Synthesis and Electrochemical Properties of Lithium Ferrous Silicate Cathode Materials. Adv Mater. 2022;11(1):20-29. doi: 10.11648/j.am.20221101.13
@article{10.11648/j.am.20221101.13, author = {Wang Qingsheng and Pavel Novikov and Anadoli Popovich and Yang Zhelong and Yu Yao and Okonov Leonid}, title = {Studies on Synthesis and Electrochemical Properties of Lithium Ferrous Silicate Cathode Materials}, journal = {Advances in Materials}, volume = {11}, number = {1}, pages = {20-29}, doi = {10.11648/j.am.20221101.13}, url = {https://doi.org/10.11648/j.am.20221101.13}, eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.am.20221101.13}, abstract = {The lithium ferrous silicate (Li2FeSiO4) has high theoretical capacity of 330 mAh/g, abundant raw material resources, stable working voltage, excellent thermal stability of Si-O bond, environmental protection and low cost, and has become one of the attractive cathode materials in high-energy lithium batteries. However, the conductivity of Li2FeSiO4 material itself is poor, and the ionic conductivity is low, so improving the conductivity and Li+ diffusion coefficient of the material has become the focus of research. In this paper, Li2FeSiO4 material was synthesized by the combination of sol-gel method and solid-state sintering method, and the nano-material and metal ion doping were realized by liquid-phase grinding method, which increased the specific surface area and conductivity of the material and increased the specific energy of the material. XRD, TGDSC, particle size analysis and electrochemical capacity test show that the specific capacity of the initial Li2FeSiO4 material synthesized in solid phase is 120 mAh/g, and the capacity of the nano-treated Li2FeSiO4 material reaches 140mah/g; The Li2Fe0.5Mn0.5SiO4 material obtained by Mn doping has a capacity of 160mah/g; The volume of Li2Fe0.5Mn0.45Ti0.05SiO4 synthesized by adding metal Ti is increased to 195mah/g; The electrical conductivity of Li2Fe0.5Mn0.5Si0.975V0.025O4+C synthesized by doping v and c can be significantly improved, and the discharge capacity can reach about 200mAh/g. In the liquid phase grinding of the mixture of ethanol and acetone, it was found that the tautomers of alcohol and ketone were in the dynamic equilibrium of ketone and enol, and acetone met positively charged metal ions to form stable metal salts, which improved the stability of the material.}, year = {2022} }
TY - JOUR T1 - Studies on Synthesis and Electrochemical Properties of Lithium Ferrous Silicate Cathode Materials AU - Wang Qingsheng AU - Pavel Novikov AU - Anadoli Popovich AU - Yang Zhelong AU - Yu Yao AU - Okonov Leonid Y1 - 2022/03/23 PY - 2022 N1 - https://doi.org/10.11648/j.am.20221101.13 DO - 10.11648/j.am.20221101.13 T2 - Advances in Materials JF - Advances in Materials JO - Advances in Materials SP - 20 EP - 29 PB - Science Publishing Group SN - 2327-252X UR - https://doi.org/10.11648/j.am.20221101.13 AB - The lithium ferrous silicate (Li2FeSiO4) has high theoretical capacity of 330 mAh/g, abundant raw material resources, stable working voltage, excellent thermal stability of Si-O bond, environmental protection and low cost, and has become one of the attractive cathode materials in high-energy lithium batteries. However, the conductivity of Li2FeSiO4 material itself is poor, and the ionic conductivity is low, so improving the conductivity and Li+ diffusion coefficient of the material has become the focus of research. In this paper, Li2FeSiO4 material was synthesized by the combination of sol-gel method and solid-state sintering method, and the nano-material and metal ion doping were realized by liquid-phase grinding method, which increased the specific surface area and conductivity of the material and increased the specific energy of the material. XRD, TGDSC, particle size analysis and electrochemical capacity test show that the specific capacity of the initial Li2FeSiO4 material synthesized in solid phase is 120 mAh/g, and the capacity of the nano-treated Li2FeSiO4 material reaches 140mah/g; The Li2Fe0.5Mn0.5SiO4 material obtained by Mn doping has a capacity of 160mah/g; The volume of Li2Fe0.5Mn0.45Ti0.05SiO4 synthesized by adding metal Ti is increased to 195mah/g; The electrical conductivity of Li2Fe0.5Mn0.5Si0.975V0.025O4+C synthesized by doping v and c can be significantly improved, and the discharge capacity can reach about 200mAh/g. In the liquid phase grinding of the mixture of ethanol and acetone, it was found that the tautomers of alcohol and ketone were in the dynamic equilibrium of ketone and enol, and acetone met positively charged metal ions to form stable metal salts, which improved the stability of the material. VL - 11 IS - 1 ER -