초임계 수열법으로 합성한 Li(Ni0.5Mn0.3Co0.2)O2 양극 활물질의 소성 온도영향에 따른 구조 및 전기화학적 특성
Effect of Calcination Temperatures on the Structure and Electrochemical Characterization of Li(Ni0.5Mn0.3Co0.2)O2 as Cathode Material by Supercritical Hydrothermal Synthesis Method
1
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
리튬이온 전지의 양극물질로써, 초임계 수열합성법을 이용해 만들어진 분말은 각각 850oC와 900oC 공기 분위기에서 10시간씩 소성하여 Li(Ni0.5Mn0.3Co0.2)O2를 합성하였다. 온도를 조절함에 따라 합성된 분말은 어떠한 영향을 받는지 x-ray pattern, SEM-image, 물리적 특성과 전기화학적 거동을 관찰해 연구하였다. 그 결과, 900oC에서 열처리된 물질의 입자크기가 850oC에서 열처리된 물질에 비해 더 큰 것으로 나타났고, 특히 초기 가역용량 163.84 mAh/g (0.1 C/2.0- 4.3 V), 186.87 mAh/g (0.1 C/2.0-4.5 V)의 가역용량을 나타내면서 훌륭한 전기화학적 거동을 보였으며, 50th cycle에서도 91.49%(0.2 C/2.0-4.3 V)와 90.36%(0.2 C/2.0-4.5 V)의 높은 용량 유지율을 보였다.
Abstract
As the cathode material for li-ion battery, Li(Ni0.5Mn0.3Co0.2)O2 were synthesized by supercritical hydrothermal method and calcined 850oC and 900oC for 10hrs in air. The effect of temperature in the heat treatment on the powder and its performance were studied of xray diffraction pattern, SEM-image, physical properties and electrochemical behaviors. As a result, calcined at 900oC material particle size more increase than calcined at 850oC material, especially shows excellent electrochemical performance with initial reversible specific capacity of 163.84 mAh/g (0.1C/2.0-4.3V), 186.87 mAh/g (0.1C/2.0-4.5V) and good capacity retention of 91.49% (0.2C/2.0-4.3V) and 90.36% (0.2C/2.0-4.5V) after 50th charge/discharge cycle.
참고문헌 (13)
- O2perpared by carbonate coprecipitation method, "J. Power Sources.", 2005, 306~
- O2 cathode materials synthesized by a sol-gel method, "J. Power Sources", 2003, 166~
- E. Y. Bang, "Lithium nickel cobalt oxides synthesized from Li2CO3, NiO and Co3O4 by the solid-state reaction method", Ceramics International, 38, pp.3635~ (2012)
- Y. Nishida, "Synthesis and properties of gallium-doped LiNiO2 as the cathode material for lithium secondary batteries", J. Power Source, 68, pp.561~ (1997)
- M. Y. Song, "Electrochemical properties of LiNi1−yCoyO2 cathode materials synthesized from different starting materials by the solid-state reaction method", CeramicsInternational, 35, pp.1625~ (2009)
- 조성우, "단순 연소법으로 합성한 LiNi0.5Mn0.3Co0.2O2 양극 활물질의 구조 분석 및 전기화학적 특성 연구", 전기화학회지, 13(4), pp.264~269 (2010), 한국전기화학회
- O2 positive-electrode via hydroxide co-precipitation method for lithium-ion batteries, "Trans Nonferrous Met. Soc. China", 2011, 114~
- Ping He, "Electrochemical characteristics of layerd LiNi1", 3Mn1, 3O2 and with different synthesis conditions, pp.J. Power Source, 2006[DOI]
- O2 with different spherical sizes via co-precipitation, "Power Technology", 2008, 124~
- O2의 소성 온도가 전기화학적 특성에 미치는 영향, "전기화학회지", 2013, 59~64, pp.한국전기화학회
- De-Cheng Li, "Effect of synthesis method on the electrochemical performance of LiNi1", 3 Mn1, 3O2, pp.J. Power Source, 2004[DOI]
- Hyun-Soo Kim, "Synthesis, and Electrochemical Performance of LiNi0.4 Mn0.4Co0.2O2 Cathede Material for Lithium Rechargeable Battery", J. Electronic Materials Letter, 2, pp.119~ (2006)
- Xiangfeng Zhang, "Synthesis and electrochemical behavior of a new layered cathode material LiCo1", 2Mn1, 6O2, pp.J. Materials Research Bulletin, 2006[DOI]