journal article·2020-09-09Open access

Mn4+-Substituted Li-Rich Li1.2Mn0.43+Mnx4+Ti0.4–xO2 Materials with High Energy Density

Shiyao Zheng, Ke Zhou, Feng Zheng, Haodong Liu, Guiming Zhong, Wenhua Zuo, Ningbo Xu, Gang Zhao, Mingzeng Luo, Jue Wu, Chunyang Zhang, Zhongru Zhang, Shunqing Wu, Yong Yang

ACS Applied Materials & Interfaces· Volume 12· Issue 36

Abstract

In this work, Li-rich Li 1.2 Mn 0.4 3+ Mn x 4+ Ti 0.4– x O 2 (LMM x TO, 0 ≤ x ≤ 0.4) oxides have been studied for the first time. X-ray diffraction (XRD) patterns show a cation-disordered rocksalt structure when x ranges from 0 to 0.2. After Mn 4+ substitution, LMM 0.2 TO delivers a high specific capacity of 322 mAh g –1 at room temperature (30 °C, 30 mA g –1 ) and even 352 mAh g –1 (45 °C, 30 mA g –1 ) with an energy density of 1041 Wh kg –1 . The reason for such a high capacity of LMM 0.2 TO is ascribed to the increase of both cationic (Mn) and anionic (O) redox after Mn 4+ substitution, which is proved by d Q /d V curves, X-ray absorption near edge structure, DFT calculations, and in situ XRD results. In addition, the roles of Mn 3+ and Ti 4+ in LMM 0.2 TO are also discussed in detail. A ternary phase diagram is established to comprehend and further optimize the earth-abundant Mn 3+ –Mn 4+ –Ti 4+ system. This work gives an innovative strategy to improve the energy density, broadening the ideas of designing Li-rich materials with better performance.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Microwave Dielectric Ceramics Synthesis

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China

Department of Physics, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Key Laboratory of Low Dimensional Condensed Matter Physics (Department of Education of Fujian Province), and Jiujiang Research Institute, Xiamen University, Xiamen 361005, China

Department of NanoEngineering, University of California San Diego, La Jolla, California 92093, United States

Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, China

School of Energy, Xiamen University, Xiamen 361005, China

Laboratory of Photonics and Interfaces, Department of Chemistry and Chemical Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland

Funding

National Natural Science Foundation of China

References (36)

Show source-provided references
1. 10.1038/s41560-018-0097-010.1038/s41560-018-0097-0 ↗
2. 10.1039/C8CS00322J10.1039/C8CS00322J ↗
3. 10.1016/j.jpowsour.2017.05.09110.1016/j.jpowsour.2017.05.091 ↗
4. 10.1016/j.jpowsour.2018.11.05310.1016/j.jpowsour.2018.11.053 ↗
5. 10.1126/science.125281710.1126/science.1252817 ↗
6. 10.1038/s41560-018-0184-210.1038/s41560-018-0184-2 ↗
7. 10.1039/C7EE03195E10.1039/C7EE03195E ↗
8. 10.1038/ncomms1210810.1038/ncomms12108 ↗
9. 10.1021/acs.jpcc.9b0288710.1021/acs.jpcc.9b02887 ↗
10. 10.1039/C5CP00853K10.1039/C5CP00853K ↗
11. 10.1021/acsami.9b2173810.1021/acsami.9b21738 ↗
12. 10.1021/jacs.6b0511110.1021/jacs.6b05111 ↗
13. 10.1021/acs.chemmater.7b0151110.1021/acs.chemmater.7b01511 ↗
14. 10.1126/science.aac826010.1126/science.aac8260 ↗
15. Seo D.-H. · Nat. Chem. · 2016 · 8 · 69210.1038/nchem.2524 ↗
16. 10.1002/aenm.20150214310.1002/aenm.201502143 ↗
17. 10.1039/C7TA10829J10.1039/C7TA10829J ↗
18. 10.1021/acsaem.9b0105110.1021/acsaem.9b01051 ↗
19. 10.1038/s41467-018-03403-910.1038/s41467-018-03403-9 ↗
20. 10.1126/science.124643210.1126/science.1246432 ↗
21. 10.1021/nl504075410.1021/nl5040754 ↗
22. 10.1038/s41586-018-0015-410.1038/s41586-018-0015-4 ↗
23. 10.1039/C5EE02329G10.1039/C5EE02329G ↗
24. 10.1039/C8EE00816G10.1039/C8EE00816G ↗
25. 10.1073/pnas.150490111210.1073/pnas.1504901112 ↗
26. 10.1021/acsami.9b1601110.1021/acsami.9b16011 ↗
27. 10.1039/C9TA11739C10.1039/C9TA11739C ↗
28. 10.1038/ncomms1381410.1038/ncomms13814 ↗
29. 10.13538/j.1001-8042/nst.26.05010210.13538/j.1001-8042/nst.26.050102 ↗
30. 10.1149/1.144687010.1149/1.1446870 ↗
31. 10.1039/C8RA03722A10.1039/C8RA03722A ↗
32. 10.1038/nmat447910.1038/nmat4479 ↗
33. 10.1021/ja410137s10.1021/ja410137s ↗
34. 10.1038/s41560-017-0043-610.1038/s41560-017-0043-6 ↗
35. 10.1016/j.elecom.2015.08.00310.1016/j.elecom.2015.08.003 ↗
36. 10.1111/j.1151-2916.1980.tb10732.x10.1111/j.1151-2916.1980.tb10732.x ↗