서냉 소결 합성법에 의한 리튬 2차 전지 용 양극재료 Potassuim Tetratitanate whisker 합성 및 리튬이온 교환 특성 연구 = The Effect of Synthetic Heat-treatment Temperatures on the Substitution Behavior of Lithium ions in Potassium Tetratitanate

다국어 초록 (Multilingual Abstract)

Putting potassium tetratitanate to use as a cathode material for a rechargeable lithium ion battery, it was investigated that the effect of synthetic heat-treatment temperature of potassium tetratitanate on the amount of the substituted lithium ion. Potassium tetratitanate was synthesized at the temperature of 950℃, 1000℃ and 1050℃ under the reactant mole ratios of TiO_2/K_2O is 3.91, respectively.
After that, K^+ion situated at the spacing of adjacent (Ti_4O_9)^2- Sheets from potassium tetratitanate was exchanged with H^+ion then it was intercalated with Li^+ion. The higher the synthetic heat-treatment temperature of potassium tetratitanate went the narrower became the (Ti_4O_9)^2- interlayer space of it and the longer became its length. It was the whisker synthesized at 950℃ that the amount of intercalated lithium ions most rich.
As the interlayer space of (Ti_4O_9)^2- sheets swelled in low synthetic heat-treatment temperature, the migration of lithium ion into its interlayer space was eased.
In comparison with long potassium tetratitanate heat-treated in high temperature, the potassium tetratitanate heat-treated in low temperature became shorter its length so the migrating distance of lithium ion into its interlayer space got shorted.
In addition, on account of the number of short potassium tetratitanate whisker synthesized at 950℃ per the same weight is rich than the number of long potassium tetratitanate whisker synthesized at 1000℃ and 1050℃ per the same weight, the amount of lithium ion intercalated into the whisker synthesized at 950℃ was most abundant.

목차 (Table of Contents)

• 목차
• I. 서론 = 1
• II. 이론적 고찰 = 2
• II-1. LIB(Lithium Ion Battery) = 2
• II-2. 리튬 2차 전지의 양극 물질 = 4
• II-2-1. 대표적 전극재 = 5
• II-2-1-1. 금속 산화물 = 5
• II-2-1-2. 황화합물 = 6
• II-2-1-3. 전도성 고분자 = 6
• II-3. 티탄산칼륨의 결정구조 = 8
• II-4. 상평형도 고찰 = 8
• II-5. 입성장 기구 고찰 = 11
• III. 실험 방법 = 12
• III-1. 시료 준비 및 합성 조건 = 12
• III-2. 해섬처리 = 13
• III-3. 염산처리 = 15
• III-4. 리튬치환 = 18
• III-5. 분석 = 19
• IV. 결과 및 고찰 = 20
• IV-1. 실험 배경 = 20
• IV-3. 실험 방법 = 21
• IV-4. 실험 결과 = 23
• V. 결론 = 41
• 참고문헌 = 42
• Abstract = 47