期刊
ADVANCED MATERIALS INTERFACES
卷 5, 期 16, 页码 -出版社
WILEY
DOI: 10.1002/admi.201800848
关键词
atomic layer deposition; amorphous TiO2 layer; zinc anode; zinc ion batteries
资金
- National Key Research and Development Program of China [2016YFA0202603]
- National Basic Research Program of China [2013CB934103]
- Programme of Introducing Talents of Discipline to Universities [B17034]
- National Natural Science Foundation of China [51521001, 51602239]
- National Natural Science Fund for Distinguished Young Scholars [51425204]
- Hubei Provincial Natural Science Foundation of China [2016CFB267]
With the rapid development of energy storage devices, aqueous battery with noncombustion properties and instinct safe features has received great attentions and Zn anode is investigated intensively due to its high theoretical capacity (820 mAh g(-1)), and low negative potential (-0.762 V vs SHE). However, the unavoidable gas evolution hinders the cyclability and the application in the commercial field. Herein, the atomic layer deposition of TiO2 coating is first demonstrated as the protection layer of metallic zinc anode. The corrosion of zinc plate is significantly suppressed, leading to less gas evolution and Zn(OH)(2) byproduct formation. The reduced gas generation on the outer surface of the zinc plate will maintain the effective contact area between the electrolyte and anode and leads to an improved coulombic efficiency. In this way, the Zn anode with 100 ALD cycles TiO2 protection shows reduced overpotential (72.5 mV) at 1 mA cm(-2) for Zn-Zn symmetrical battery and additionally, the protection of TiO2 extended the Zn-MnO2 battery cycling performance up to 1000 cycles with the capacity retention of 85% at current density of 3 mA cm(-2). The novel design of atomic layer deposition protected metal zinc anode brings in new opportunities to the realization of the ultrasafe aqueous zinc metal batteries.
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