Heterostructural SnO/SnO2@C composite fabricated from tin-based coordination polymer as high-performance anode materials for lithium ion batteries

• Published in: Materials letters Vol. 251; pp. 94 - 97
• Main Authors: Xia, Shu-Biao, Li, Fu-Shao, Shen, Xiang, Li, Xue, Cai, Xiao-Lan, Liu, Jian-Jun
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.09.2019; Elsevier BV
• Subjects: Anode material; Anodes; Carbonization; Composite materials; Coordination polymers; Electrochemical analysis; Electrode materials; Electrodes; Energy storage and conversion; Li ion batteries; Lithium; Lithium-ion batteries; Materials science; Migration; Particulate composites; Polymers; Prepolymers; Rechargeable batteries; Tin; Tin dioxide; Tin oxides; Anode material; Composite materials; Li ion batteries; Polymers; Energy storage and conversion
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2019.05.051

•Tin-based coordination polymer was first used to prepare SnO/SnO2@C composite.•SnO/SnO2@C electrode exhibits excellent electrochemical performance.•Carbon matrix can improve the electronic conductivity and reversible capacity of SnO2. We report a simple carbonization strategy to obtain a composite structured SnO/SnO2 particles encapsulated into carbon matrix from a tin-based coordination polymer precursor at 500 °C carbonization. SnO/SnO2@C electrode delivers a capacity of 601.7 mAh g−1 at 100 mA g−1 after 50 cycles and a high capacity retention of 84.6% after 400 cycles, which is far superior to the precursor Sn-1 electrode. The excellent electrochemical performance of SnO/SnO2@C could be mainly attributed to the abundant carbon and well-dispersed SnO/SnO2 particles which can improve the electronic conductivity and provide a path for the migration of electrons and ions.