期刊
JOURNAL OF POWER SOURCES
卷 481, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2020.229110
关键词
Aqueous lithium ion battery; Aqueous sodium ion battery; LiTi2(PO4)(3)@C/CNTs; Anode; NASICON
资金
- National Natural Science Funds of China [51302214, 51572215]
- Shaan Xi Province Natural Science Fund [2019JZ-49]
- Xi'an Science and Technology Plan Project [201805034YD12CG18(5)]
- China Scholarship Council at Purdue University
Aqueous alkali metal ion batteries with LiTi2(PO4)(3)@C/CNTs (LTP@C/CNTs) composite anode exhibit improved rate and cycling performance at high current densities compared to LiTi2(PO4)(3)@C (LTP@C). The composite anode also demonstrates a two-step sodium ion insertion/extraction behavior in ASIBs, with the LTP converting into a NTP phase after cycling, showing great potential for next-generation aqueous energy storage systems.
Aqueous alkali metal ion batteries show great promise as the next generation secondary batteries with low cost, high power density and better safety. However, they suffer from inferior cycle stability at a higher current density and displays poor coulombic efficiency. In this work, LiTi2(PO4)(3)@C/CNTs (LTP@C/CNTs) with threedimensional mesoporous nanostructure was investigated in both aqueous lithium-ion batteries (ALIBs) and aqueous sodium-ion battery (ASIBs). Improved rate and cycling performance at high current densities were demonstrated in contrast to LiTi2(PO4)(3)@C (LTP@C). Typically, the LTP@C/CNTs electrode achieves a discharge capacity of 97.37 mAhg(-1) and 90.88 mAhg(-1) in ALIBs and ASIBs half cells at 3 A g(-1) current density. LTP@C/ CNTs//LiMn2O4 and LTP@C/CNTs//Na0.44MnO2 full cells show the capacity retention of 72.9% and 79.4% after 500 cycles. Besides, new electrochemical behavior is reported for the first time, that the anode materials present a two-step sodium ion insertion/extraction in ASIBs. After cycling, LTP anode converts into (NaTi2(PO4)(3)) NTP phase with maintained crystallinity. LTP@C/CNTs composite anode thus shows a great potential application in next-generation aqueous energy storage systems.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据