石油化工高等学校学报2024，Vol.37Issue(4)：76-82,7.DOI:10.12422/j.issn.1006-396X.2024.04.010
焦磷酸锡负极材料的制备及性能研究
Preparation and Properties of Tin Pyrophosphate Anodes
摘要
Abstract
As a new class of materials,tin pyrophosphate stands out due to its high specific capacity and suitable lithium insertion potential.Carbon-coated SnP2O7 particles anchored on a carbon framework(SPO/C@C)have been synthesised by an environmentally friendly approach using phytic acid as a phosphorus and carbon source,with polyethylene oxide(PEO)as an additional carbon source.Experimental results show that the addition of extra carbon layer effectively mitigates the volume expansion of the material and reduces the charge transfer resistance,thereby improving the electronic conductivity and the capacitance contribution ratio.That the SPO/C@C sample with 1.36 g of PEO exhibits excellent dispersion and electrochemical performance.At a current density of 0.5 A/g,the discharge specific capacity is 351.3 mA·h/g after 250 cycles,and at a scan rate of 2.0 mV/s,the capacitance contribution ratio is 60.8%.关键词
焦磷酸锡/碳包覆/植酸/锂离子电池/负极材料Key words
Tin pyrophosphate/Carbon coating/Phytic acid/Lithium-ion batteries/Anode material分类
化学化工引用本文复制引用
马文钊,王利娟..焦磷酸锡负极材料的制备及性能研究[J].石油化工高等学校学报,2024,37(4):76-82,7.基金项目
辽宁省"兴辽英才计划"项目(XLYC1907025) （XLYC1907025）
辽宁省教育厅面上项目(LJKZ0408) （LJKZ0408）
辽宁石油化工大学第五次人才基金项目(2018XJJ-012). （2018XJJ-012）
