[1]谢嫚,李泽华,李帅杰,等.钠离子电池无粘结剂二氧化钛负极材料的合成[J].中国材料进展,2020,(04):287-294.[doi:10.7502/j.issn.1674-3962.201901006]
 XIE Man,LI Zehua,LI Shuaijie,et al.Synthesis of Binder-Free Titanium Dioxide Anode Materials for Rechargeable Sodium-Ion Batteries[J].MATERIALS CHINA,2020,(04):287-294.[doi:10.7502/j.issn.1674-3962.201901006]
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钠离子电池无粘结剂二氧化钛负极材料的合成()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
期数:
2020年第04期
页码:
287-294
栏目:
出版日期:
2020-04-30

文章信息/Info

Title:
Synthesis of Binder-Free Titanium Dioxide Anode Materials for Rechargeable Sodium-Ion Batteries
文章编号:
1674-3962(2020)04-0287-08
作者:
谢嫚1李泽华1李帅杰2肖根华1罗熳3蒋文全3陈人杰1吴锋1
1.北京理工大学材料学院,北京 100081)(2.宁德时代新能源科技股份有限公司,福建 宁德 352100)(3.有研工程技术研究院有限公司,北京 101417)
Author(s):
XIE Man1LI Zehua1LI Shuaijie2XIAO Genhua1LUO Man3 JIANG Wenquan3CHEN Renjie1WU Feng1
(1.School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China) (2.Contemporary Amperex Technology Co., Ltd., Ningde 352100, China) (3.Research Engineering Technology Research Institute Co., Ltd., Beijing 101417, China)
关键词:
钠离子电池无粘结剂二氧化钛纳米线阵列负极
Keywords:
sodiumion battery binderfree titanium dioxide nanowire array anode
分类号:
TM912;TB33
DOI:
10.7502/j.issn.1674-3962.201901006
文献标志码:
A
摘要:
作为电池的重要组成部分,电极材料直接影响电池的能量密度。电极材料在制作过程中往往会添加粘结剂以稳定极片结构,但粘结剂的加入会降低电极材料的比容量,影响其离子迁移速率。通过在经水热反应刻蚀的钛箔/网上原位生长二氧化钛(TiO2)得到无粘结剂TiO2/Ti纳米线阵列电极,并系统地研究不同钛基底及水热反应温度对TiO2/Ti纳米线阵列电极物理性能和电化学性能的影响。结果表明,不同钛基底及水热反应温度均对生长的TiO2纳米线的形貌和电化学性能有重要影响。其中通过220 ℃水热反应生长在钛网(0.15 mm)上的TiO2纳米线呈蛛网状,具有较大的比表面积,属于锐钛矿型TiO2,储钠过程主要由赝电容效应控制,且具有优秀的电化学性能:首周放电比容量为986 mAh g-1,库伦效率为21.7%;随后放电比容量逐渐稳定在240 mAh g-1左右;循环200周后放电比容量仍能达到228 mAh g-1,库伦效率稳定在99.3%左右;即使在3200 mA g-1的超大电流密度下,放电比容量仍能达到152 mAh g-1。无粘结剂电极材料极大可以有限地提升电极材料的比容量,对未来高能量密度电池体系的设计具有一定的理论意义和参考价值。
Abstract:
As an important part of rechargeable sodium-ion batteries, electrode materials have a direct impact on the energy density of batteries. Binders tend to be added to stabilize the structure of the electrode during the fabrication of the electrode materials, but the addition of binders will reduce the specific capacity and affect the rate of ion migration of electrode materials. Here,binder-free titanium dioxide/titanium(TiO2/Ti)nanowire array electrodes are prepared by in-situ growth on titanium foil/mesh by hydrothermal process. The effects of different titanium substrates and hydrothermal reaction temperatures on the physical and electrochemical properties of TiO2/Ti nanowire array electrodes are investigated systematically. The results show that different titanium substrates and hydrothermal reaction temperatures heavily affect the micromorphology and electrochemical properties of the grown TiO2 nanowires. Among them, the TiO2 nanowires grown on titanium mesh (0.15 mm) by hydrothermal reaction at 220 ℃ (TiW-100-220) are cobweb-like with a large specific surface area. Moreover, the TiO2 nanowires grown on Ti mesh(0.15 mm) at 220 ℃ are anatase, which have a lower activation energy than TiO2 nanowires with other crystal structures. The main sodium storage process of TiW-100-220 is controlled by pseudocapacitance reaction, which has better electrochemical performance. The discharge capacity and coulombic efficiency of TiW-100-220 anode is 986 mAh g-1 and 21.7% in the first cycle. The discharge capacity of TiW-100-220 anode gradually stabilizes at 240 mAh g-1 from the second cycle. The discharge capacity of TiW-100-220 anode is 228 mAh g-1 after 200 cycles, and the coulombic efficiency is stable at about 99.3%. Even at a high current density of 3200 mA g-1, the discharge capacity of TiW-100-220 anode can still reach 152 mAh g-1. The binder-free electrode materials greatly increase the specific capacity of the electrode materials, which might be possible to offer theoretical significance and reference value to design a high energy density battery in the future.

备注/Memo

备注/Memo:
收稿日期:2019-01-06修回日期:2019-06-09 基金项目:国家重点基础研究发展计划项目(2016YFB0901501);国家自然科学基金资助项目(51772030);国家自然科学基金联合基金项目(U1564206);北京市科技计划项目(D151100003015001)第一作者:谢嫚,女,1965年生,副教授,硕士生导师, Email: xmxm@bit.edu.cn
更新日期/Last Update: 2020-03-26