分级过程对LiFePO4/C电池性能的影响

doi:10.13208/j.electrochem.160930

电化学（中英文） ›› 2017, Vol. 23 ›› Issue (6): 661-666. doi: 10.13208/j.electrochem.160930

分级过程对LiFePO₄/C电池性能的影响

刘兴亮，杨茂萍，汪伟伟, 曹勇*

合肥国轩高科动力能源有限公司，安徽合肥 230011

收稿日期:2016-09-30 修回日期:2017-01-14 出版日期:2017-12-28 发布日期:2017-06-08
通讯作者: 曹勇 E-mail:caoyong@gotion.com.cn
基金资助:
安徽省科技攻关项目（No. 1501021011）资助

Effects of jet milling and classifying process on the performance of LiFePO₄/C in full batteries

LIU Xing-liang, YANG Mao-ping , WANG Wei-wei, CAO Yong*

Hefei Guoxuan High-tech Power Energy Co.,Ltd, Hefei, Anhui 230011, China

Received:2016-09-30 Revised:2017-01-14 Published:2017-12-28 Online:2017-06-08
Contact: CAO Yong E-mail:caoyong@gotion.com.cn

摘要/Abstract

摘要： 本文采用磷酸铁工艺路线制备碳包覆的磷酸铁锂（LiFePO₄/C）复合正极材料，系统考察气流粉碎分级过程对LiFePO₄/C正极材料及全电池性能的影响. 研究表明：分级前磷酸铁锂颗粒粒度较大，中值粒径为17.37μm，呈规整球形形貌，具有较高的振实密度和碳含量；分级后球形被打碎，振实减小. 全电池测试结果显示：分级过程对全电池的容量、交流内阻、直流内阻、功率密度的影响较小；但分级前电芯的低温放电容量保持率和550周的高温循环保持率分别60.1%和87.5%，明显优于分级后的49.5%和84.7%. 分级前碳层能均匀包覆在磷酸铁锂表面形成均匀导电网络，而分级过程将磷酸铁锂的碳层有一定的剥离和破坏导致性能下降.

关键词: 磷酸铁锂, 气流粉碎分级, 全电池, 电化学性能

Abstract: The carbon coated lithium iron phosphate (LiFePO₄/C) composite cathode material was prepared by using iron phosphate process. The effects of jet milling and classifying process on the electrochemical performance of LiFePO₄/C cathode material in full batteries were investigted. Scanning electron microscopic analyses suggested that the globose secondary particles were crustily crushed during the jet milling and classifying process, which would further result in lower tap density and carbon content. The LiFeP₄/C composite cathode materials with different physical characteristics were further tested in full batteries to evaluate the electrochemical properties. The results showed no obvious differences in capacity, AC resistance, DC resistance and power density. However, the globose LiFePO₄/C exhibited far better performances in low temperature discharge capacity retention rate and high temperature cycle retention than that of granulated composite cathode, which probably arisen from the certain delamination and destruction of conductive network during the jet milling and classifying process.

Key words: LiFePO₄/C, jet milling and classifying, full battery, electrochemical performance.

中图分类号:

O646
TM912

刘兴亮，杨茂萍，汪伟伟, 曹勇. 分级过程对LiFePO₄/C电池性能的影响[J]. 电化学（中英文）, 2017, 23(6): 661-666.

LIU Xing-liang, YANG Mao-ping,WANG Wei-wei, CAO Yong. Effects of jet milling and classifying process on the performance of LiFePO₄/C in full batteries[J]. Journal of Electrochemistry, 2017, 23(6): 661-666.

导出引用管理器 EndNote|Ris|BibTeX

链接本文: https://electrochem.xmu.edu.cn/CN/10.13208/j.electrochem.160930

https://electrochem.xmu.edu.cn/CN/Y2017/V23/I6/661

参考文献

[1] Beninati S, Damen L, Mastragostino M. Fast sol-gel synthesis of LiFePO₄/C for high power lithium-ion batteries for hybrid electric vehicle application[J]. Journal of Power Sources, 2009, 194(2): 1094-1098.

[2] Maier J. Nanoionics: ion transport and electrochemical storage in confined system[J]. Nature Materials, 2005, 4(11): 805-815.

[3] Wu K P, Peng Z D, Cao Y B, et al. Synthesis and characterization of high-rate LiMn_1/3Fe_2/3PO₄/C composite using nano MnFe₂O₄ as precursor[J]. Materials letters, 2015, 152: 217-219.

[4] Cui Y, Zhao X L, Guo R S. High rate electrochemical performances of nanosized ZnO and carbon co-coated LiFePO₄ cathode[J]. Materials Research Bulletin, 2010, 45(7): 844-849.

[5] Molenda J, Ojczyk W, ?wierczek K, et al. Diffusional mechanism of deintercalation in LiFe_1−yMn_yPO₄ cathode material[J]. Solid State Ionics, 2006, 177(26-32): 2617-2624.

[6] Xu G J, Liu Z H, Cui G L, et al. Strategies for improving the cyclability and thermo-stability of LiMn₂O₄-based batteries at elevated temperatures[J]. Journal of Materials Chemistry A, 2015(3): 4092-4123.

[7] Huang H, Yin S C, L. F. Nazar. Approaching theoretical capacity of LiFePO₄ at room temperature at high rates[J]. Electrochemical and Solid-State Letters, 2001, 4(10): 170-172.

[8] Swain P, Viji M, Pavana S V, et al. Carbon coating on the current collector and LiFePO₄nanoparticles–Influence of sp² and sp³-like disordered carbon on the electrochemical properties[J]. Journal of Power Sources, 2015, 293: 613-625.

[9] Rangappa D, Sone K, Kudo T, et al. Directed growth of nanoarchitectured LiFePO₄ electrode by solvothermal synthesis and their cathode properties[J]. Journal of Power Sources. 2010, 195(18): 6167-6171.

[10] Qian L C, Xia Y, Zhang W K , et al. Electrochemical synthesis of mesoporous FePO₄ nanoparticles for fabricating high performance LiFePO₄/C cathode materials[J]. Microporous and Mesoporous Materials, 2012, 152:128-133.

[11] Peng W X, Jiao L F, H Y Gao, et al. A nove sol-gel method based on FePO₄·2H₂O to synthesize submicrometer structured LiFePO₄/C cathode material[J]. Journal of Power Sources, 2011, 196(5): 2841-2847.

[12] Yamada A, Chung S C, Hinokuma K, Optimized LiFePO₄ for lithium battery cathodes[J]. Journal of The Electrochemical Society, 148 (2001) A224-229.

[13] Tang Z Y(唐致远), Gao F(高飞), Xue J J(薛建军). Effects of Ball-milling on the Preparation of LiFePO₄ Cathode Material for Lithium-ion Batteries(球磨方式对锂离子正极材料LiFePO₄性能的影响)[J]. Chinese Journal of Inorganic Chemistry(无机化学学报), 2007, 23(8):1415-1420.

[14] Gao F(高飞), Tang Z Y(唐致远), Xue J J(薛建军). Preparation and characterization of nano-particle LiFePO₄ and LiFePO₄/C by spray-drying and post-annealing method[J]. Chinese Journal of Inorganic Chemistry (无机化学学报), 2007, 23(9): 1603-1608.

[15] Zhang Y H, Song W J, Lin S L, et al. A novel model of the initial state of charge estimation for LiFePO₄ batteries[J]. J. Power Sources, 2014, 248(15): 1028-1033.

分级过程对LiFePO₄/C电池性能的影响

Effects of jet milling and classifying process on the performance of LiFePO₄/C in full batteries

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

Metrics

[1]	杨云锐, 董欢欢, 郝志强, 何祥喜, 杨卓, 李林, 侴术雷. 高性能锂硫电池用钴/碳复合材料硫宿主[J]. 电化学（中英文）, 2023, 29(4): 2217003-.
[2]	贠潇如, 陈宇方, 肖培涛, 郑春满. 关于水系锌离子电池中无氧钒基正极材料的综述[J]. 电化学（中英文）, 2022, 28(11): 2219004-.
[3]	梁振浪, 杨耀, 李豪, 刘丽英, 施志聪. 基于不同前驱体制备的硬碳负极材料的储锂性能[J]. 电化学（中英文）, 2021, 27(2): 177-184.
[4]	吴凯. Na₃V₂(PO₄)₂O₂F的合成及其在钠离子电池中的应用[J]. 电化学（中英文）, 2021, 27(1): 56-62.
[5]	孙梦雷, 张达奇, 冯金奎, 倪江锋. 钒基电极材料研究进展[J]. 电化学（中英文）, 2019, 25(1): 45-54.
[6]	何大平，木士春. 质子交换膜燃料电池铂电催化剂稳定策略[J]. 电化学（中英文）, 2018, 24(6): 655-663.
[7]	王鸿辉，马明洁，冯婕，康黄雅，黄文杰. 钕掺杂二氧化铅复合阳极的电化学性能研究[J]. 电化学（中英文）, 2018, 24(4): 367-374.
[8]	张伶潇，赵惠慧，张丽娟，付予. Ag-TiO₂-MnO₂复合材料的制备与电化学性能研究[J]. 电化学（中英文）, 2018, 24(3): 292-299.
[9]	李全一，杨琪，赵艳红. 二氧化钼-碳复合涂层的电化学性能研究[J]. 电化学（中英文）, 2018, 24(2): 160-165.
[10]	王友，曾一文，钟星，刘星，汤泉. 锂离子电池负极材料Li₃V₂(BO₃)₃/C 复合材料的合成及电化学性能研究[J]. 电化学（中英文）, 2018, 24(2): 174-181.
[11]	罗化峰，乔元栋. 纤维素微孔锂电隔膜的制备及性能研究[J]. 电化学（中英文）, 2017, 23(5): 610-616.
[12]	程琥, 聂晓燕, 申叶丹, . 哌啶型离子液体混合电解液在Li/LiCoO₂电池中的性能研究[J]. 电化学（中英文）, 2017, 23(1): 59-63.
[13]	杨亚雄，马瑞军，高明霞，潘洪革，刘永锋. 晶态Li₁₂Si₇锂离子电池负极材料的电化学性能研究[J]. 电化学（中英文）, 2016, 22(5): 521-527.
[14]	刘永畅，陈程成，张宁，王刘彬，向兴德，陈军. 钠离子电池关键材料研究及应用进展[J]. 电化学（中英文）, 2016, 22(5): 437-452.
[15]	朱立伟*, 阎云海, 贾慧, 梁润芬. 利用均相沉淀剂和形貌导向剂水热一步合成层状镍钴氢氧化物[J]. 电化学（中英文）, 2016, 22(4): 412-416.