Polyacrylonitrile template-assisted formation of LiMn2O4 nanoparticles for lithium-ion batteries

다국어 초록 (Multilingual Abstract)

In this study, LiMn2O4 (LMO) nanoparticles were fabricated using polyacrylonitrile (PAN) templates and the annealingprocess. In order to optimize their electrochemical performance for LIBs, we adjusted the annealing temperatures to 600, 700,800, and 900 oC. For comparison, the LMO particles were prepared using the solid-state reaction method. Interestingly, dueto the limited grain growth and aggregation of the LMO by the PAN templates, the samples prepared by the PAN templatesannealed at 700 oC revealed the nanoparticles below ~ 150 nm in size. As compared to other samples, the LMO nanoparticlesprepared at 700 oC showed a superb specific discharge capacity of ~103.6 mAh/g at 100 cycles (capacity retention of ~ 82.7%)and a good high-rate performance (~ 81.8 mAh/g at 5 C). These outstanding electrochemical performances are due to theshorted diffusion distance of Li+by the LMO nanoparticles thanks to the PAN templates and the improved electroactive sitesby the correct stoichiometric LMO phases without impurities at the optimum annealing temperature. Thus, these resultsindicate that the LMO nanoparticles formed via the PAN templates annealed at 700 oC could be used as promising cathodematerials for high-performance LIBs.

참고문헌 (Reference)

1 G.-H. An, 272 : 828-836, 2014

2 F. Cheng, 4 : 3668-3675, 2011

3 J. Wang, 16 : 16021-16029, 2014

4 X. Gao, 275 : 38-44, 2015

5 G.-H. An, 8 : 19466-19474, 2016

6 Q. Zhang, 17 : 10353-10357, 2015

7 C. H. Jiang, 172 : 410-415, 2007

8 Y. Chen, 196 : 6493-6497, 2011

9 K. R. Ragavendran, 16 : 2553-2560, 2014

10 I.-M. Hung, 41 : S779-S786, 2015

11 B.-R. Koo, 178 : 288-291, 2016

12 G.-H. An, 18 : 6587-6594, 2016

13 K. M. Shaju, 20 : 5557-5562, 2008

14 D. Guo, 632 : 222-228, 2015

15 K. Saeed, 322 : 400-405, 2008

16 O. Toprakci, 4 : 1273-1280, 2012

17 Y.-P. Fu, 35 : 3463-3468, 2009

18 T. Cui, 44 : 542-548, 2008

19 K. W. Kim, 9 : 187-192, 2003

20 C. V. Ramana, 37 : 412-416, 2005

21 N. Treuil, 103 : 2100-2106, 1999

22 G. An, 19 : 275709-, 2008

23 Y.-L. Ding, 21 : 9475-9479, 2011

24 F.-Y. Shih, 159 : 179-185, 2006

25 A. Subramania, 102 : 19-23, 2007

26 H. M. Wu, 161 : 1260-1263, 2006

27 X. Li, 61 : 3597-3600, 2007

28 Y. Meng, 31 : 820-824, 2015

29 Kyung Wan Kang, "Synthesis and electrochemical properties of Cr and Vsubstituted Li2MnO3 as cathode materials for secondary lithium batteries" 세라믹공정연구센터 17 (17): 54-58, 2016

30 Thitima Waket, "Preparation of tin and tin sulfide alloy on carbons and graphene via chemical method for use as anodes in lithiumion batteries" 세라믹공정연구센터 17 (17): 73-79, 2016