Stabilizing a Li-Mn-O Cathode by Blocking Lattice O Migration through a Nanoscale Phase Complex

Huang, Weiyuan1; Zhang, Mingjian7; Ge, Mingyuan1,8; Li, Shunning1; Xie, Lin3; Chen, Zhefeng; Wang, Gang2; Lin, Junhao2; Qiu, Jimin1; Yu, Lei3,4; Wen, Jianguo4; Ren, Guo-Xi5; Lin, Cong1; Zhao, Wenguang1; Chen, Haibiao6; Pan, Feng1

2023

10.1021/acsenergylett.2c02507

ACS Energy Letters   Impact Factor & Quartile

2380-8195

Among all intercalation cathodes for Li-ion batteries, Li-Mn-O layered oxides offer the highest initial energy density at the lowest cost, due to the joint contribution from cationic and anionic redox chemistry. However, the poor cycling capability, resulting from the continuous lattice O loss at high potentials (>4.5 V), hinders practical applications. Herein, we employed phase complex engineering to obtain a new Li-Mn-O nanohybrid cathode featuring the uniform and coherent integration of layered nanodomains and spinel nanodomains. The combination of DFT calculations, synchrotron-based transmission X-ray microscopy, in situ differential electrochemical mass spectrometry, in situ synchrotron XRD, and electrochemical tests demonstrated that the O migration path in layered nanodomains was blocked by the neighboring spinel nanodomains with a higher oxygen vacancy migration energy, thus effectively suppressing the irreversible lattice O loss at high potentials and enhancing the cycling stability in both capacity and average voltage. The strategy is experimentally demonstrated to be effective and it leads to a new path for developing stable high-energy-density cathode materials.

SCI

English

Corresponding

Guangdong Innovative and Entrepreneurial Research Team Program[52172175] ; Shenzhen Science and Technology Research Grant[2021B1515130002] ; Municipal Development and Reform Commission of Shenzhen[2017B030301013] ; DOE Office of Science by Brookhaven National Laboratory[2019ZT08C044] ; Laboratory Directed Research and Development program at Brookhaven National Laboratory["JCYJ20200109140416788","JCYJ20210324130812033","KQTD20190929173815000"] ; U.S. DOE, Office of Basic Energy Sciences[DE-SC0012704] ; null[LDRD 20-030] ; null[DE-AC02-06CH11357]

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

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

WOS:000931956000001

AMER CHEMICAL SOC

Web of Science

1.Peking Univ, Sch Adv Mat, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Guangdong, Peoples R China
3.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Guangdong, Peoples R China
4.Argonne Natl Lab, Ctr Nanoscale Mat, Lemont, IL 60439 USA
5.Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China
6.Shenzhen Polytech, Inst Marine Biomed, Shenzhen 518055, Peoples R China
7.Chinese Univ Hong Kong, Sch Sci & Engn, Shenzhen 518172, Peoples R China
8.Brookhaven Natl Lab, Natl Synchrotron Light Source II NSLS II, Upton, NY 11973 USA

Huang, Weiyuan,Zhang, Mingjian,Ge, Mingyuan,et al. Stabilizing a Li-Mn-O Cathode by Blocking Lattice O Migration through a Nanoscale Phase Complex[J]. ACS Energy Letters,2023.

Huang, Weiyuan.,Zhang, Mingjian.,Ge, Mingyuan.,Li, Shunning.,Xie, Lin.,...&Pan, Feng.(2023).Stabilizing a Li-Mn-O Cathode by Blocking Lattice O Migration through a Nanoscale Phase Complex.ACS Energy Letters.

Huang, Weiyuan,et al."Stabilizing a Li-Mn-O Cathode by Blocking Lattice O Migration through a Nanoscale Phase Complex".ACS Energy Letters (2023).