陈昶,曹凤红,邓迟,徐要辉,刘春海,张伟.LiFePO4/C多层膜的制备及电化学性能研究[J].表面技术,2019,48(2):76-81.
CHEN Chang,CAO Feng-hong,DENG Chi,XU Yao-hui,LIU Chun-hai,ZHANG Wei.Preparation and Electrochemical Properties of LiFePO4/C Multilayer[J].Surface Technology,2019,48(2):76-81 |
| LiFePO4/C多层膜的制备及电化学性能研究 |
| Preparation and Electrochemical Properties of LiFePO4/C Multilayer |
| 投稿时间：2018-07-19 修订日期：2019-02-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.02.011 |
| 中文关键词: 多靶磁控溅射 304不锈钢 LiFePO4/C多层膜 调制周期 石墨化程度 电化学性能 |
| 英文关键词:multi-target magnetron sputtering 304 stainless steel LiFePO4/C multilayer modulation period graphitization degree electrochemical property |
| 基金项目:国家自然科学基金资助项目(51201111)；材料腐蚀与防护四川省重点实验室开放基金项目（2015CL04）；乐山师范学院校级培育计划青年项目（z16005）；乐山市科技局重点研究项目（18JZD098） |
| 作者 | 单位 |
| 陈昶 | 1.乐山师范学院 物理与电子工程学院，四川 乐山 614000 |
| 曹凤红 | 1.乐山师范学院 物理与电子工程学院，四川 乐山 614000 |
| 邓迟 | 1.乐山师范学院 物理与电子工程学院，四川 乐山 614000 |
| 徐要辉 | 1.乐山师范学院 物理与电子工程学院，四川 乐山 614000 |
| 刘春海 | 2.成都理工大学 材料与化学化工学院，成都 610059 |
| 张伟 | 3.四川理工学院 分析测试中心，四川 自贡 643000；4.材料腐蚀与防护四川省重点实验室，四川 自贡 643000 |
|
| Author | Institution |
| CHEN Chang | 1.School of Physics and Electronic Engineering, Leshan Normal University, Leshan 614000, China |
| CAO Feng-hong | 1.School of Physics and Electronic Engineering, Leshan Normal University, Leshan 614000, China |
| DENG Chi | 1.School of Physics and Electronic Engineering, Leshan Normal University, Leshan 614000, China |
| XU Yao-hui | 1.School of Physics and Electronic Engineering, Leshan Normal University, Leshan 614000, China |
| LIU Chun-hai | 2.School of Materials and Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China |
| ZHANG Wei | 3.Analysis and Test Center, Sichuan University of Science and Engineering, Zigong 643000, China; 4.Key Laboratory for Material Corrosion and Protection of Sichuan Province, Zigong 643000, China |
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| 中文摘要: |
| 目的 研究LiFePO4/C多层膜在不同的调制周期下的电化学性能。方法 采用多靶磁控溅射方法，在304不锈钢基底上，先沉积10 nm Ti薄膜作为阻挡层，然后交替沉积LiFePO4薄膜和C薄膜，制备三组不同调制周期的[LiFePO4/C]n多层膜。通过扫描电子显微镜（SEM）及其附带的EDS能谱仪对退火前和经500 ℃退火2 h后的不同调制周期[LiFePO4/C]n多层膜的截面形貌、成分进行表征，利用X射线衍射仪（XRD）对退火前和经500 ℃退火2 h后的LiFePO4薄膜及不同调制周期[LiFePO4/C]n多层膜的结构进行表征，利用激光显微拉曼光谱仪（Raman）分析经500 ℃退火2 h后不同调制周期[LiFePO4/C]n多层膜中的C结构，利用循环伏安和恒流充放电法对LiFePO4薄膜和不同调制周期[LiFePO4/C]n多层膜的电化学性能进行测试。结果 调制周期为7.5次的[LiFePO4 (160 nm)/C(16 nm)]7.5多层膜中的碳石墨化程度高于调制周期为15次的[LiFePO4 (80 nm)/C(8 nm)]15和调制周期为5次的[LiFePO4 (240 nm)/C(24 nm)]5多层膜，且具有更好的充放电容量和倍率性能。在0.1 C放电倍率下，[LiFePO4 (160 nm)/C(16 nm)]7.5多层膜的放电容量为151 mAh/g，在5 C高放电倍率下的放电容量为30 mAh/g。结论 适当的调制周期下，LiFePO4/C多层膜具有良好的电化学性能。 |
| 英文摘要: |
| The work aims to study the electrochemical properties of LiFePO4/C multilayer films in different modulation pe-riods. 10 nm Ti film was deposited on 304 stainless steel as the barrier layer by multi-target magnetron sputtering and then the LiFePO4/C films were deposited alternately to prepare three [LiFePO4/C]n multilayer films with different modulation periods. The cross-sectional morphology and composition of [LiFePO4/C]n multilayer films with different modulation periods before and after annealing at 500 ℃ for 2 h were characterized by SEM and EDS. The structure of LiFePO4 film and [LiFePO4/C]n multilayer films with different modulation periods before and after annealing at 500 ℃ for 2 h was characterized by XRD. The C structure of [LiFePO4/C]n multilayer films with different modulation periods after annealing at 500 ℃ for 2 h was characterized by Raman. The electrochemical property of LiFePO4 film and [LiFePO4/C]n multilayer films with different modulation periods was evaluated by cyclic voltammetry and galvanostatic charge-discharge tests. The degree of graphitization in [LiFePO4 (160 nm)/C(16 nm)]7.5 (the modulation cycle of 7.5 times) multilayer was higher than that in [LiFePO4 (80 nm)/C(8 nm)]15 (the modulation cycle of 15 times) and [LiFePO4 (240 nm)/C(24 nm)]5 (the modulation cycle of 5 times) multilayers. The [LiFePO4 (160 nm)/C(16 nm)]7.5 multilayer had better charge-discharge capacity and rate performance than the [LiFePO4 (80 nm)/C(8 nm)]15 and [LiFePO4 (240 nm)/ C(24 nm)]5 multilayers. The specific capacity of [LiFePO4 (160 nm)/C(16 nm)]7.5 was 151 mAh/g at 0.1 C, and the specific capacity was 30 mAh/g at 5 C. LiFePO4/C multilayer has good electrochemical properties under the appropriate modulation period. |
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