基于碳包覆磷酸钛钠及活性炭的水系混合超级电容器的研究

doi:10.6023/A16100523

化学学报 ›› 2017, Vol. 75 ›› Issue (2): 241-246.DOI: 10.6023/A16100523 上一篇

所属专题：先进电池材料

研究论文

基于碳包覆磷酸钛钠及活性炭的水系混合超级电容器的研究

王超强^a, 邱飞龙^a, 邓瀚^a, 张晓禹^a, 何平^a, 周豪慎^a,b

a 南京大学储能材料与技术中心现代工程与应用科学学院固体微结构国家重点实验室人工微结构科学与技术协同创新中心中国南京 210093;
b 能源技术研究所日本产业技术综合研究所日本筑波 3058568

投稿日期:2016-10-04 修回日期:2017-02-22 发布日期:2017-02-23
通讯作者: 周豪慎,E-mail:pinghe@nju.edu.cn,hszhou@nju.edu.cn E-mail:pinghe@nju.edu.cn,hszhou@nju.edu.cn
基金资助:
项目受国家重点基础研究项目（2014CB932302），国家自然科学基金（21673116，21403107，21373111），江苏省自然科学基金（BK20160068，BK20140055），江苏省高校优势学科建设项目和江苏省产学研联合项目（BY2015069-01）资助.

Study on the Aqueous Hybrid Supercapacitor Based on Carbon-coated NaTi₂(PO₄)₃ and Activated Carbon Electrode Materials

Wang Chaoqiang^a, Qiu Feilong^a, Deng Han^a, Zhang Xiaoyu^a, He Ping^a, Zhou Haoshen^a,b

a Center of Energy Storage Materials & Technology, College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China;
b Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology(AIST), Tsukuba 3058568, Japan

Received:2016-10-04 Revised:2017-02-22 Published:2017-02-23
Contact: 10.6023/A16100523 E-mail:pinghe@nju.edu.cn,hszhou@nju.edu.cn
Supported by:
Project supported by the National Basic Research Program of China (2014CB932302), National Natural Science Foundation of China (21673116, 21403107, 21373111), Natural Science Foundation of Jiangsu Province of China (BK20160068, BK20140055), PAPD of Jiangsu Higher Education Institutions, and the Project on Union of Industry-Study-Research of Jiangsu Province (BY2015069-01).

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摘要/Abstract

本文研究了以碳包覆磷酸钛钠[NaTi₂（PO₄）₃/C]为负极、活性炭（AC）为正极的超级电容器.以柠檬酸为碳源，采用液相法制备前驱物，利用高温固相反应制备得到NaTi₂（PO₄）₃/C纳米颗粒.正负极活性物质质量比值为2.2，组装NaTi₂（PO₄）₃/C//Na₂SO₄//AC钠离子基水系混合超级电容器.电化学性能测试表明，在电压范围0.15~1.4 V，电流密度为0.5 A·g^-1的条件下，该电容器的比功率为121.15 W·kg^-1，比能量为18.71 Wh·kg^-1.提升电流密度至10 A·g^-1，比功率可达2.42 kW·kg^-1，相应比能量为14.13 Wh·kg^-1.在1 A·g^-1的电流密度下，循环1000圈，该电容器的比容量仍保持在初始值的76%.该器件很有希望作为高功率的辅助能量储存设备实现应用.

关键词: 水溶液, 钠离子, 混合型超级电容器, 磷酸钛钠, 活性炭

Supercapacitors have been regarded as one of the next-generation energy storage devices because of the high power density, excellent cycling performance, long lifespan and easy maintenance. However, its relatively low specific energy hinders its application in the future. Recently, Na-ion based aqueous hybrid supercapacitors have attracted worldwide attention due to its high energy density, environment friendly and low cost. In our work, the Na-ion aqueous hybrid supercapacitor is constructed with NaTi₂(PO₄)₃/C and commercial activated carbon as electrode materials. NaTi₂(PO₄)₃/C nanoparticles with the size of about 40 nm were synthesized by high-temperature solid state reaction method using the NaTi₂(PO₄)₃/C precursor that was prepared through the solution method with Ti(C₄H₉O)₄, NH₄H₂PO₄, Na₂CO₃ as the raw materials, and citric acid as the carbon source. The electrochemical tests were performed using 1 mol·L^-1 Na₂SO₄ solution as the electrolyte. The carbon-coated NaTi₂(PO₄)₃ electrode delivers the discharge capacity of 122 mAh·g^-1 and shows an excellent cycling stability with the retention of 60% of the initial capacity after 1000 cycles at a 10C rate. The supercapacitor was consisted of NaTi₂(PO₄)₃/C anode, AC cathode and 1 mol·L^-1 Na₂SO₄ electrolyte. And the weight ratio of active materials in cathode and anode was 2.2. Cyclic voltammetry, galvanostatic test were employed to study the electrochemical properties of the supercapacitor. The as-fabricated device was then cycled between 0.15~1.4 V with different current density. Our results show the power density of 121.15 W·kg^-1 with specific energy of 18.71 Wh·kg^-1 at the current density of 0.5 A·g^-1. Moreover, the specific energy and power density goes to 14.13 Wh·kg^-1 and 2.42 kW·kg^-1 at a higher current density of 10 A·g^-1. More importantly, the device showed an excellent cycling stability with the retention of 76% after 1000 cycles at a current density of 1 A·g^-1. This research shows the designed hybrid supercapacitor has the potential to be used as auxiliary high-power energy storage device for the practical applications.

Key words: aqueous electrolyte, sodium-ion, hybrid supercapacitor, NaTi₂(PO₄)₃, activated carbon

引用此文

王超强, 邱飞龙, 邓瀚, 张晓禹, 何平, 周豪慎. 基于碳包覆磷酸钛钠及活性炭的水系混合超级电容器的研究[J]. 化学学报, 2017, 75(2): 241-246.

Wang Chaoqiang, Qiu Feilong, Deng Han, Zhang Xiaoyu, He Ping, Zhou Haoshen. Study on the Aqueous Hybrid Supercapacitor Based on Carbon-coated NaTi₂(PO₄)₃ and Activated Carbon Electrode Materials[J]. Acta Chim. Sinica, 2017, 75(2): 241-246.

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基于碳包覆磷酸钛钠及活性炭的水系混合超级电容器的研究

Study on the Aqueous Hybrid Supercapacitor Based on Carbon-coated NaTi₂(PO₄)₃ and Activated Carbon Electrode Materials

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基于碳包覆磷酸钛钠及活性炭的水系混合超级电容器的研究

Study on the Aqueous Hybrid Supercapacitor Based on Carbon-coated NaTi2(PO4)3 and Activated Carbon Electrode Materials

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Study on the Aqueous Hybrid Supercapacitor Based on Carbon-coated NaTi₂(PO₄)₃ and Activated Carbon Electrode Materials