The beneficial effects of black phosphorous modification of the anode current collector in Li-metal free Li2S-based batteries

Zhao，Yun1,2; Ye，Hualin2; Zhang，Huanyu1; Zhao，Dan2; Huang，Limin1; Lee，Jim Yang2

2022-12-01

10.1016/j.mtener.2022.101179

Materials Today Energy   Impact Factor & Quartile

2468-6069

2468-6069

Li–S batteries assembled without a lithium metal anode can significantly increase the battery specific energy and obviate the safety issue of excess Li metal in the battery. In this study we found that a black phosphorous (BP) modified cooper foil current collector could provide a beneficial anode solid-electrolyte-interface (SEI) to enable the charging and discharging of Li-metal free LiS-based batteries at higher C rates. The BP modification is effective in several aspects: the lithiophilicity of BP reduces the energy barrier in Li metal deposition and stripping during battery charge and discharge. The reactions between BP and lithium polysulfides also form LiPS in the anode SEI layer. Since LiPS has a high ionic conductivity for Li diffusion, the Li plating/stripping efficiency is improved. The synergy of the lithiophilicity of BP and a LiPS-rich anode interphase layer was demonstrated in Li-metal free LiS batteries, where the capacity retention over 100 cycles is 64.8% at the 0.2 C rate. The findings here show that current collector modifications should attend to multiple functionalities in order to be effective for the Li-metal free LiS batteries.

Black phosphorous Current collector modification Li-metal free anode Li2S batteries Solid electrolyte interphase

SCI

English

First ; Corresponding

Southern University of Science and Technology (SUSTech) startup fund through the Shenzhen Peacock Talent program, Guangdong Provincial Key Laboratory of Energy Materials for Electric Power[2018B030322001] ; Guangdong Provincial Key Laboratory of Catalysis[2020B121201002] ; Shenzhen Clean Energy Research Institute[CERI-KY-2019-0 03] ; Shenzhen Key Laboratory of Solid-State Batteries[ZDSYS20180208184346531]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000891933300008

ELSEVIER SCI LTD

2-s2.0-85141224558

Scopus

1.Department of Chemistry,Southern University of Science and Technology,Shenzhen,518055,China
2.Department of Chemical & Biomolecular Engineering,National University of Singapore,Singapore,117585,Singapore

Zhao，Yun,Ye，Hualin,Zhang，Huanyu,et al. The beneficial effects of black phosphorous modification of the anode current collector in Li-metal free Li2S-based batteries[J]. Materials Today Energy,2022,30.

Zhao，Yun,Ye，Hualin,Zhang，Huanyu,Zhao，Dan,Huang，Limin,&Lee，Jim Yang.(2022).The beneficial effects of black phosphorous modification of the anode current collector in Li-metal free Li2S-based batteries.Materials Today Energy,30.

Zhao，Yun,et al."The beneficial effects of black phosphorous modification of the anode current collector in Li-metal free Li2S-based batteries".Materials Today Energy 30(2022).