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Co–Sn nanocrystalline solid solutions as anode materials in lithium-ion batteries with high pseudocapacitive contribution

AuthorsLi, Junshan; Xu, Xijun; Luo, ZhiShan; Zhang, Chaoqi; Zuo, Yong; Zhang, Ting ; Tang, Peng-Yi ; Infante-Carrió, Maria F.; Arbiol, Jordi ; Llorca, Jordi; Liu, Jun; Cabot, Andreu
Issue Date2019
CitationChemSusChem 12(7): 1451-1458 (2019)
AbstractCo–Sn solid‐solution nanoparticles with Sn crystal structure and tuned metal ratios were synthesized by a facile one pot solution‐based procedure involving the initial reduction of a Sn precursor followed by incorporation of Co within the Sn lattice. These nanoparticles were used as anode materials for Li‐ion batteries. Among the different compositions tested, Co0.7Sn and Co0.9Sn electrodes provided the highest capacities with values above 1500 mAh g−1 at a current density of 0.2 A g−1 after 220 cycles, and up to 800 mAh g−1 at 1.0 A g−1 after 400 cycles. Up to 81 % pseudocapacitance contribution was measured for these electrodes at a sweep rate of 1.0 mV s−1, thereby indicating fast kinetics and long durability. The excellent performance of Co–Sn nanoparticle alloy‐based electrodes was attributed to both the small size of the crystal domains and their suitable composition, which buffered volume changes of Sn and contributed to a suitable electrode restructuration.
Publisher version (URL)https://doi.org/10.1002/cssc.201802662
Appears in Collections:(CIN2) Artículos
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