Polymer-in-Salt Electrolyte from Poly(caprolactone)-graft-polyrotaxane for Ni-Rich Lithium Metal Batteries at Room Temperature

Wang, Yiting1; Li, Zenan1; Xu, Hongli1,3; Wang, Qingrong1; Peng, Wenjing1; Chi, Shangsen1; Wang, Chaoyang2; Wang, Jun1; Deng, Yonghong1

2023-06-23

10.1021/acsami.3c05597

ACS APPLIED MATERIALS & INTERFACES   影响因子和分区

1944-8244

1944-8252

Solid-state lithium batteries with solid polymer electrolyteshaverecently attracted extensive attention due to their promising potentialin high energy density and safety. However, the principal issues plaguingthe solid polymer electrolytes are their restricted ionic conductivitiesat ambient temperature and the limited tolerance to the widely usedhigh-voltage cathodes (such as LiNi0.8Mn0.1Co0.1O2, NCM811), thus limiting their practical applicationsseriously. In this regard, a superior polymer-in-salt solid electrolytefrom poly(caprolactone)-graft-polyrotaxane (PGPE)is developed for high-voltage lithium batteries operated at room temperature.The PGPE displays remarkable electrochemical properties at room temperature,with an exceptional ionic conductivity of 4.89 x 10(-4) S cm(-1) and a lithium-ion transference number ofapproximately 0.64, stemming from the rapid segmental motions of PCLsidechains by the enhanced dynamics of the cyclic molecules alongthe axial polymer chain of polyrotaxane. More importantly, the PGPEdemonstrates a high electrochemical oxidation voltage of & SIM;4.7V, suggesting the excellent electrochemical stability of PGPE againstthe NCM811-based cathode. Owing to the dense LiF-rich CEI self-generatedon the NCM811 particles in the cathode, the transition metal ion diffusionis successfully constrained and the PGPE is well protected from continuousdecomposition. The PGPE also shows superior interfacial stabilitybetween the metallic Li and the electrolyte. As a result, the all-solid-stateNCM811|PGPE|Li cell exhibits superior discharge capacity (196 mAhg(-1)) and extraordinary long-term cycling stability(74% capacity retention at 150 cycles) at 30 & DEG;C.

poly(rotaxane) poly(caprolactone) polymer-in-saltelectrolyte NCM811 high-voltage lithium metalbattery

SCI ; EI

英语

第一 ; 通讯

National Key Ramp;D Program of China[2022YFB3807700] ; Guangdong Basic and Applied Basic Research Foundation[2021A1515010206] ; Shenzhen Science and Technology Program["RCBS20200714114819216","JCYJ20220818100407016"] ; Opening Project of Key Laboratory of Polymer Processing Engineering (South China University of Technology), Ministry of Education[KFKT1905]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:001018068100001

AMER CHEMICAL SOC

20232814390239

Cathodes ; Electric discharges ; Electrochemical oxidation ; Grafting (chemical) ; Ionic conductivity ; Lithium compounds ; Lithium-ion batteries ; Polyelectrolytes ; Solid electrolytes ; Solid-State Batteries ; Transition metal compounds ; Transition metals

Metallurgy and Metallography:531 ; Metallurgy:531.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Secondary Batteries:702.1.2 ; Electrochemistry:801.4.1 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Organic Polymers:815.1.1 ; Polymer Products:817.1

Web of Science

1.Southern Univ Sci & Technol SUSTech, Sch Innovat & Entrepreneurship, Dept Mat Sci & Engn, Guangdong Prov Key Lab Energy Mat Elect Power, Shenzhen 518055, Peoples R China
2.South China Univ Technol, Res Inst Mat Sci, Guangzhou 510640, Peoples R China
3.South China Univ Technol, Key Lab Polymer Proc Engn, Minist Educ, Guangzhou 510640, Peoples R China

Wang, Yiting,Li, Zenan,Xu, Hongli,et al. Polymer-in-Salt Electrolyte from Poly(caprolactone)-graft-polyrotaxane for Ni-Rich Lithium Metal Batteries at Room Temperature[J]. ACS APPLIED MATERIALS & INTERFACES,2023,15(26):31552-31560.

Wang, Yiting.,Li, Zenan.,Xu, Hongli.,Wang, Qingrong.,Peng, Wenjing.,...&Deng, Yonghong.(2023).Polymer-in-Salt Electrolyte from Poly(caprolactone)-graft-polyrotaxane for Ni-Rich Lithium Metal Batteries at Room Temperature.ACS APPLIED MATERIALS & INTERFACES,15(26),31552-31560.

Wang, Yiting,et al."Polymer-in-Salt Electrolyte from Poly(caprolactone)-graft-polyrotaxane for Ni-Rich Lithium Metal Batteries at Room Temperature".ACS APPLIED MATERIALS & INTERFACES 15.26(2023):31552-31560.