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| Nano-Li3V2(PO4)3/C Synthesized by Thermal Polymerization Method as Cathode Material for Lithium Ion Batteries |
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Bin Cheng1, Lian-sheng Jiao2, Zhong-feng Tang1, Sheng-jie Zhang2, Hong-li Chen2, Chun-hua Chen1
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1.CAS Key Laboratory of Materials for Energy Conversions, Department of Materials Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei 230026, China;2.Department of Chemistry, Hebei Normal University for Nationalities, Chengde 067000, China
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| Abstract: |
| A nano-Li3V2(PO4)3/C powder was successfully prepared by a thermal polymerization method. The particle sizes of the intermediate product powder and the final product Li3V2(PO4)3 are all less than 200 nm. The carbon is partially coated on the surface of Li3V2(PO4)3 particles and the rest exists between particles with a total carbon content of 4.6wt%. This nano-Li3V2(PO4)3/C sample shows a discharge capacity of 124 mAh/g without capacity fading after 100 cycles at 0.1 C in the voltage rang of 3.0-4.3 V. Excellent rate performance is also achieved with a capacity of 80 mAh/g at 20 C in 3.0-4.3 V and 100 mAh/g at 10 C in 3.0-4.8 V. This study suggests that the thermal polymerization method is suitable to synthesize nano-Li3V2(PO4)3/C materials. |
| Key words: Lithium vanadium phosphate Thermal polymerization Nanoparticles Acrylic acid |
| FundProject: |
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| 热聚合法制备纳米级Li3V2(PO4)3/C作为锂离子电池正极材料的性能研究 |
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程斌1, 焦连升2, 唐仲丰1, 张圣洁2, 陈鸿利2, 陈春华1
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1.中国科学技术大学材料科学与工程系, 中国科学院能量转换材料重点实验室, 合肥 230026;2.河北民族师范学院化学系, 承德 067000
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| 摘要: |
| 通过热聚合法成功制备出纳米级Li3V2（PO4）3/C正极材料，中间产物和最终材料的Li3V2（PO4）3/C颗粒均小于200 nm，无定形碳的含量为4.6%，处于Li3V2（PO4）3颗粒表面和颗粒与颗粒之间.该材料在3.0sim4.3 V和0.1 C电流下放电比容量为124 mAh/g，100次循环之后无衰减，表现出较好的循环性能.其倍率性能优异，在3.0sim4.3 V和20 C的条件下放电比容量达到80 mAh/g，在3.0sim4.8 V和10 C的条件下放电比容量达到100 mAh/g. |
| 关键词: 磷酸钒锂 热聚合法 纳米颗粒 丙烯酸 |
| DOI：10.1063/1674-0068/29/cjcp1604091 |
| 分类号: |