Monitoring the Local Coordination Evolutions in Li-Rich Cathode Materials via In Situ Raman Spectroscopy

Wang, Yanfang1,2,3; Li, Yingzhi3; Li, Zhiqiang3; Qin, Ning3; Wu, Feng3; Makepeace, Joshua W.2; Zhang, Fucai1; Allan, Phoebe K.2; Lu, Zhouguang3

2023-10-27

10.1021/acsenergylett.3c02109

ACS ENERGY LETTERS   影响因子和分区

2380-8195

Although consensus has been reached that the lattice oxygen (O2-) could be ultimately oxidized to molecular O-2 in lithium-rich cathode materials (LRCMs), monitoring the local coordination evolutions around oxygen in real time is still demanding. Herein, we demonstrate the potential of using in situ Raman spectroscopy to decipher the local environment changes upon de-/lithiation in Li2RuO3. Evolutions of both the Ru-Ru motions and Ru-O vibrations have been captured by in situ Raman tests and interpreted in combination with multimodal characterizations. Uniquely, triggering the anion redox reactions (ARRs) produces a Raman band (similar to 500 cm(-1)), which upon careful examination is attributed to the Ru-O-2(n-) (0 < n < 4) coordination and suggested as the indicator of O-O dimerization. Considering its nondestructivity and high sensitivity to lattice vibrations, this work could shed new light on utilizing Raman spectroscopy to investigate the local coordination evolutions in LRCMs and other materials.

SCI ; EI

英语

第一 ; 通讯

Basic Research Project of the Science and Technology Innovation Commission of Shenzhen[JCYJ20220818100418040] ; Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials[ZDSYS20200421111401738] ; National Natural Science Foundation of China["U22A20439","21875097","12074167"]

Chemistry ; Electrochemistry ; Energy & Fuels ; Science & Technology - Other Topics ; Materials Science

Chemistry, Physical ; Electrochemistry ; Energy & Fuels ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:001096796500001

AMER CHEMICAL SOC

20234815126824

Binary alloys ; Cathodes ; Coordination reactions ; Lithium compounds ; Molecular oxygen ; Redox reactions

Chemical Reactions:802.2 ; Inorganic Compounds:804.2

Web of Science

1.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
2.Univ Birmingham, Sch Chem, Birmingham B15 2TT, England
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen Key Lab Interfacial Sci & Engn Mat, Shenzhen 518055, Peoples R China

Wang, Yanfang,Li, Yingzhi,Li, Zhiqiang,et al. Monitoring the Local Coordination Evolutions in Li-Rich Cathode Materials via In Situ Raman Spectroscopy[J]. ACS ENERGY LETTERS,2023,8(11):4888-4894.

Wang, Yanfang.,Li, Yingzhi.,Li, Zhiqiang.,Qin, Ning.,Wu, Feng.,...&Lu, Zhouguang.(2023).Monitoring the Local Coordination Evolutions in Li-Rich Cathode Materials via In Situ Raman Spectroscopy.ACS ENERGY LETTERS,8(11),4888-4894.

Wang, Yanfang,et al."Monitoring the Local Coordination Evolutions in Li-Rich Cathode Materials via In Situ Raman Spectroscopy".ACS ENERGY LETTERS 8.11(2023):4888-4894.