Inorganic Chemicals Industry >
Study on the one-step hydrothermal synthesis of LiFePO4 and its properties
Received date: 2020-01-16
Online published: 2020-06-12
In order to optimize the one-step preparation technology of lithium iron phosphate （LiFePO4） by liquid phase me-thod,LiFePO4 cathode material was synthesized from ferrous sulfate,ammonium dihydrogen phosphate and lithium hydroxide by adding sodium dodecylbenzene sulfonate（SDBS） as surfactant.The effect of one-step hydrothermal synthesis technology on the composition,structure,morphology and particle size of LiFePO4 was studied.The material was characterized by ICP,XRD,SEM and particle size analyzer,and its electrochemical properties were tested.The results show that Li1.02Fe0.994PO4 with micron spherical particle morphology has been synthesized.The first charge-discharge specific capacities at 0.1C ratio are 162.0 mA·h/g and 159.9 mA·h/g,respectively.The Coulomb efficiency is 98.7% and the rate performance（in terms of 1C/0.1C holding rate） is 92.3%,and the holding rate of capacity was 96.4% at 0.1C ratio after 100 times cycle.It showed good electrochemical performance.
Key words： Lithium iron phosphate; Hydrothermal method; Properties
Ju Guo , Shuangzhu Jia . Study on the one-step hydrothermal synthesis of LiFePO4 and its properties[J]. Inorganic Chemicals Industry, 2020 , 52(6) : 36 -40 . DOI: 10.11962/1006-4990.2019-0426
| [1] | Padhi A K, Nanjundaswamy K S, Goodenough J B . Phospho-olivines as positive-electrode materials for rechargeable lithium batteries[J]. Journal of The Electrochemical Society, 1997,144(5):1609-1613. |
| [2] | Park K S, Son J T, Chung H T , et al. Synjournal of LiFePO4 by co-precipitation and microwave heating[J]. Electrochemistry Commu-nications, 2003,5(10):839-842. |
| [3] | Xu B, Qian D, Wang Z , et al. Recent progress in cathode materials research for advanced lithium ion batteries[J]. Materials Science and Engineering, 2012,73(5/6):51-65. |
| [4] | Massarotti V, Capsoni D, Bini M . Nanosized LiMn2O4 from mechanic-ally activated solid-state synjournal[J]. Journal of Solid State Chemi-stry, 2006,179(2):590-596. |
| [5] | 张克宇, 姚耀春 . 锂离子电池磷酸铁锂正极材料的研究进展[J]. 化工进展, 2015,34(1):166-172. |
| [6] | 杜远超, 华政, 梁风 , 等. 液相法合成磷酸铁锂正极材料[J]. 化学进展, 2017,29(1):137-148. |
| [7] | 张仁国, 熊竹青, 李健 , 等. 高温固相法制备LiFePO4/C正极材料及其性能[J]. 贵州大学学报:自然科学版, 2019,36(3):57-61. |
| [8] | 李春雷, 解莹春, 李祥飞 . 磷酸铁锂正极材料的制备及改性研究进展[J]. 化工新型材料, 2018,46(7):25-28,33. |
| [9] | 冯颖, 刘凯, 霍涛涛 , 等. 镁掺杂的非化学计量比磷酸铁锂的制备及性能[J]. 化工进展, 2017,36(8):3006-3012. |
| [10] | 孙少先, 应皆荣 . 氧化沉淀-陈化晶化法制备FePO4·2H2O及LiFePO4[J]. 电源技术, 2018,42(10):1473-1476. |
| [11] | 王崇国, 卢栋林, 张仲利 , 等. 纳米磷酸铁锂的制备及其性能研究[J]. 云南化工, 2018,45(9):28-29. |
| [12] | 张金利, 杨赛, 刘媛媛 , 等. 表面活性剂对磷酸铁锂材料性能的影响研究[J]. 化工新型材料, 2013,41(6):140-142. |
| [13] | Park K Y, Park I, Kim H , et al. Lithium-excess olivine electrode for lithium rechargeable batteries[J].Energy & Environmental Scie-nce, 2016(9):2902-2915. |
| [14] | 王英, 黄文浩, 肖志平 , 等. 镁掺杂改性磷酸铁锂正极材料及其性能研究[J]. 材料导报, 2013,27(24):40-42. |
| [15] | 侯月朋, 常明飞, 刘浩 , 等. 形貌对磷酸铁锂电池内阻特性的影响[J]. 天津理工大学学报, 2017,33(6):60-64. |
| [16] | 韩梦莹 . 电池级磷酸铁的制备工艺研究[D]. 郑州:郑州大学, 2014. |
| [17] | 张俊玲 . 水热合成磷酸铁锂粉体的形貌控制[J]. 化工新型材料, 2008,36(6):74-75,93. |
| [18] | Rodrigues S, Munichandraiah N, Shukla A K . AC impedance and state-of-charge analysis of a sealed lithium-ion rechargeable bat-tery[J]. Journal of Solid State Electrochemistry, 1999,3(7):397-405. |
/
| 〈 |
|
〉 |