Safety of Tin(II) oxalate. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: Tin(II) oxalate, is researched, Molecular C2O4Sn, CAS is 814-94-8, about Na2SnO3 as a novel anode for high performance lithium storage and its electrochemical reaction mechanism. Author is Lu, Fan; Zeng, Weiying; Lin, Haifeng; Liu, Shengzhou; Tian, Xiaoqing; Yang, Jie; Li, Jumei; Yang, Yin.
Herein, Na2SnO3 is employed as an anode for rechargeable Li ion battery (LIB). The authors thoroughly studied the electrochem. performance of Na2SnO3 in comparison with the most commonly used Sn based oxides, such as SnO2 and Li2SnO3. Na2SnO3 is greatly superior to SnO2 and Li2SnO3 in terms of capacity, cycling stability and rate capability. Impressively, Na2SnO3 presents favorable specific capacity of 480 mA h g-1 at c.d. of 200 mA g-1 after 100 cycles and still delivers a capacity of 439 mA h g-1 at extremely large c.d. of 1000 mA g-1, which are leading the performance in anodes for LIBs. Ex situ SEM anal. of anodes after different cycles revealed the surface microstructure of anodes plays a critical role in determining cycling stability. The SEM results show big cracks on the surface of electrode for SnO2 after less 15 cycles and for Li2SnO3 after more 100 cycles, resulting from their severe volume change during charging-discharging process. However, Na2SnO3 electrode exhibits uniform surface morphol. after 100 cycles. It is concluded the Na2O” intrinsic matrix of Na2SnO3 combining with Li2O” formed from the conversion reaction can act as a mixture buffering matrix that contributes to keeping the electrochem. formed nanoscale Sn particles apart and preventing their agglomeration during Li-Sn alloy formation and decomposition, thus inhibiting the volume expansion and the capacity fading by maintaining the electrode integrity. The electrochem. reaction mechanism of Na2SnO3 with Li was studied by ex situ XRD technique. The findings in this study provide a new valuable anode for high-performance LIBs and an insightful viewpoint of developing anode materials with high electrochem. performance by introducing the electrochem. inactive intrinsic matrix.
《Na2SnO3 as a novel anode for high performance lithium storage and its electrochemical reaction mechanism》 provides a strategy for the preparation of materials with excellent comprehensive properties, which is conducive to broaden the application field of this compound(Tin(II) oxalate)Safety of Tin(II) oxalate.
Reference:
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