Fast ultrasound-assisted synthesis of Li2MnSiO4 nanoparticles for a lithium-ion battery
- Authors
- Hwang, Chahwan; Kim, Taejin; Shim, Joongpyo; Kwak, Kyungwon; Ok, Kang Min; Lee, Kyung-Koo
- Issue Date
- Oct-2015
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Lithium-ion battery; Cathode active material; Lithium manganese silicate; Sonochemical reaction; Sol-gel process
- Citation
- JOURNAL OF POWER SOURCES, v.294, pp 522 - 529
- Pages
- 8
- Journal Title
- JOURNAL OF POWER SOURCES
- Volume
- 294
- Start Page
- 522
- End Page
- 529
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/8994
- DOI
- 10.1016/j.jpowsour.2015.06.107
- ISSN
- 0378-7753
1873-2755
- Abstract
- High-capacity Li2MnSiO4/C (LMS/C MBS) nanoparticles have been prepared using sonochemistry under a multibubble sonoluminescence (MBS) condition, and their physical and electrochemical properties were characterized. The results show that LMS/C MBS nanoparticles exhibit a nearly pure crystalline phase with orthorhombic structure and have a spherical shape and a uniform particle size distribution centered at a diameter of 22.5 nm. Galvanostatic charge-discharge measurements reveal that LMS/C MBS delivers an initial discharge capacity of about 260 mA h g(-1) at a current rate of 16.5 mA g(-1) in the voltage range of 1.5-4.8 V (vs. Li/Li+), while LMS MBS (LMS without a carbon source under MBS) and LMS/C SG (LMS with a carbon source using the conventional sal-gel method) possess lower capacities of 168 and 9 mA h g(-1) respectively. The improved electrochemical performance of LMS/C MBS can be ascribed to the uniform nanoparticle size, mesoporous structure, and in-situ carbon coating, which can enhance the electronic conductivity as well as the lithium ion diffusion coefficient. (C) 2015 Elsevier B.V. All rights reserved.
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