Hybrid Protective Layer for Stable Sodium Metal Anodes at High Utilization

Hou，Zhen1,2,3; Wang，Wenhui4; Chen，Qianwen1; Yu，Yikang1,2,3; Zhao，Xixia1,2,3; Tang，Min1,2,3; Zheng，Yiyi1,2,3; Quan，Zewei1,2,3

2019-10-16

10.1021/acsami.9b12059

ACS Applied Materials & Interfaces   影响因子和分区

1944-8244

1944-8252

Na metal is a promising anode for Na batteries owing to its high theoretical capacity and low reduction potential. Nevertheless, an unstable and inhomogeneous solid electrolyte interphase originated from the instantaneous reactions between the Na metal anode and organic liquid electrolyte causes the intractable hurdles of dendrite growth and low Coulombic efficiency. Here, a sodium fluoride (NaF)-poly(vinylidene difluoride) (PVDF) inorganic-organic hybrid protective layer is constructed on a commercial Cu current collector via a simple blade-coating technique. A flexible PVDF matrix can endure volume change, maintaining the integrity of the anode/coating interface, while NaF particles provide improved Na diffusion conductivity and mechanical strength, suppressing the dendrite initiation and growth. Based on these synergetic effects, an excellent cycle life of more than &tild;2100 h is realized at 1 mA cm at 50% depth of discharge (DOD), which outperforms 10-fold lifetime of the Cu current collector (&tild;170 h). Moreover, the Cu current collector with a NaF-PVDF protective layer also delivers good cycling stability at 5 mA cm and an ultrahigh DOD (80%). The rational design of the hybrid protective layer offers a new approach to realize stable Na metal batteries.

artificial hybrid protective layer Cu current collector Na metal anode solid electrolyte interphase synergetic features

SCI ; EI

英语

第一 ; 通讯

Guangdong Provincial Key Laboratory of Energy Materials for Electric Power[2018B030322001]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000491219700030

AMER CHEMICAL SOC

20194207529003

Anodes ; Electric current collectors ; Secondary batteries ; Sodium Fluoride ; Solid electrolytes

Secondary Batteries:702.1.2 ; Electric Equipment:704.2 ; Electron Tubes:714.1 ; Chemical Agents and Basic Industrial Chemicals:803

2-s2.0-85073105349

Scopus

1.Department of ChemistrySouthern University of Science and Technology (SUSTech),Shenzhen, Guangdong,518055,China
2.Guangdong Provincial Key Laboratory of Energy Materials for Electric PowerSouthern University of Science and Technology (SUSTech),Shenzhen, Guangdong,518055,China
3.Shenzhen Key Laboratory of Solid State BatteriesSouthern University of Science and Technology (SUSTech),Shenzhen, Guangdong,518055,China
4.Shenzhen Key Laboratory of Organic Pollution Prevention and ControlEnvironmental Science and Engineering Research CenterHarbin Institute of Technology,Shenzhen, Guangdong,518055,China

Hou，Zhen,Wang，Wenhui,Chen，Qianwen,et al. Hybrid Protective Layer for Stable Sodium Metal Anodes at High Utilization[J]. ACS Applied Materials & Interfaces,2019,11(41):37693-37700.

Hou，Zhen.,Wang，Wenhui.,Chen，Qianwen.,Yu，Yikang.,Zhao，Xixia.,...&Quan，Zewei.(2019).Hybrid Protective Layer for Stable Sodium Metal Anodes at High Utilization.ACS Applied Materials & Interfaces,11(41),37693-37700.

Hou，Zhen,et al."Hybrid Protective Layer for Stable Sodium Metal Anodes at High Utilization".ACS Applied Materials & Interfaces 11.41(2019):37693-37700.