In-situ forming lithiophilic-lithiophobic gradient interphases for dendrite-free all-solid-state Li metal batteries

Lin，Yanke1; Wang，Tianshuai1; Zhang，Leicheng1; Peng，Xudong1; Huang，Baoling1; Wu，Maochun3; Zhao，Tianshou1,2

2022-08-01

10.1016/j.nanoen.2022.107395

Nano Energy   影响因子和分区

2211-2855

2211-3282

Solid polymer electrolytes offer a promise for all-solid-state Li batteries due to their low cost and good processability. However, dendrites and the associated contact loss occurring at the undesirable Li/electrolyte interface during repeated plating and stripping remain a challenge. To address the issue, here, we propose to coat a thin layer containing Al/Li dual-salt onto the polyethylene oxide (PEO) electrolyte. When cycled with the Li metal anode, the salts are sequentially reduced, in-situ forming a lithiophilic Li-Al alloy-rich layer near the anode and a lithiophobic LiF-rich layer close to the electrolyte. The former improves the interfacial adhesion and regulates the Li nucleation, while the latter contributes to dendrite suppression due to its high interface energy against Li. As a result, the gradient interphase enables a Li/Li symmetrical cell to be stably cycled for over 1000 h without short circuits. Moreover, the full cell paired with the LiFePO cathode shows enhanced cyclability, retaining 89.1% capacity after 350 cycles at 0.5 C. A pouch cell using the dual-salt coated electrolyte demonstrates good performance and safety. This work provides a facile yet effective approach to construct functional interphase for achieving stable batteries using solid polymer electrolytes.

All-solid-state battery Gradient interphase Interface stability Li metal anode Solid polymer electrolyte

SCI ; EI

英语

通讯

Research Grants Council of the Hong Kong Special Administrative Region, China[R6005-20]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:000836650900003

ELSEVIER

20222212181100

Aluminum alloys ; Anodes ; Binary alloys ; Interface states ; Iron compounds ; Lithium alloys ; Lithium compounds ; Lithium-ion batteries ; Polyelectrolytes ; Polyethylene oxides ; Solid state devices ; Solid-State Batteries

Aluminum Alloys:541.2 ; Lithium and Alloys:542.4 ; Alkali Metals:549.1 ; Secondary Batteries:702.1.2 ; Electron Tubes:714.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Organic Polymers:815.1.1 ; Polymer Products:817.1 ; Classical Physics; Quantum Theory; Relativity:931 ; High Energy Physics; Nuclear Physics; Plasma Physics:932

2-s2.0-85130938164

Scopus

1.Department of Mechanical and Aerospace Engineering,The Hong Kong University of Science and Technology,Clear Water Bay,Kowloon,Hong Kong SAR,China
2.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Department of Mechanical Engineering,The Hong Kong Polytechnic University,Hung Hom,Kowloon,Hong Kong SAR,China

Lin，Yanke,Wang，Tianshuai,Zhang，Leicheng,et al. In-situ forming lithiophilic-lithiophobic gradient interphases for dendrite-free all-solid-state Li metal batteries[J]. Nano Energy,2022,99.

Lin，Yanke.,Wang，Tianshuai.,Zhang，Leicheng.,Peng，Xudong.,Huang，Baoling.,...&Zhao，Tianshou.(2022).In-situ forming lithiophilic-lithiophobic gradient interphases for dendrite-free all-solid-state Li metal batteries.Nano Energy,99.

Lin，Yanke,et al."In-situ forming lithiophilic-lithiophobic gradient interphases for dendrite-free all-solid-state Li metal batteries".Nano Energy 99(2022).