CAJ | 학술논문

采用高温固相法、溶胶-凝胶法和热聚合法制备锂离子电池负极材料Li4Ti5O12，通过X-射线衍射、扫描电镜显微镜、电牝学阻抗和恒流充放电表征产物的结构、形貌及电化学性能．3种方法制备的Li4Ti5O12均为尖晶石结构，用高温固相法所得的粉体颗粒较大，而用溶胶-凝胶法所得粉体颗粒最小，其平均粒度在200350nm范围内，表现出较好的电化学性能；溶胶-凝肢法制备的样品粉末在0．2C倍率下首次放电容量为174．5mAh／g，经过25次循环后容量衰减仅5．7％．
채용고온고상법、용효-응효법화열취합법제비리리자전지부겁재료Li4Ti5O12，통과X-사선연사、소묘전경현미경、전빈학조항화항류충방전표정산물적결구、형모급전화학성능．3충방법제비적Li4Ti5O12균위첨정석결구，용고온고상법소득적분체과립교대，이용용효-응효법소득분체과립최소，기평균립도재200350nm범위내，표현출교호적전화학성능；용효-응지법제비적양품분말재0．2C배솔하수차방전용량위174．5mAh／g，경과25차순배후용량쇠감부5．7％．
The anode materialLi4Ti5O12 for Li-ion battery was synthesized by high temperature solid-state method, sol-gel method and thermal polymerization method. Its structural characterization, surface morphology and electrochemical performance of products were characterized by X-ray diffractometry, scanning electron microscopy, electrochemical impedance spectroscopy, and galvanostatic charge-discharge test. The result shows that Li4Ti5O12 prepared by the three methods.had perfect spinel structure. The powders prepared by high temperature solid-state were the biggest, while the powders prepared by sol-gel were the smallest with an average dimension of 200-350 nm and exhibited better electrochemical performance. Its initial specific discharge capacity was 174.5 mAh/g at 0.2 C rate,only reducing 5.7% after 25 cycles.