CAJ | 학술논문

利用超细旋转盘式砂磨机细化颗粒固相烧结法，合成锂离子电池正极材料 LiNi 0.80 Co 0.15 Al 0.05 O 2。原料经过砂磨后，混合均匀，粒径达到纳米级。根据塔曼定理，混合均匀的微小粒径可以在相同的烧结温度下，提高烧结的强度。SEM、XRD分别表征 NCA材料的颗粒形貌和晶形结构。结果显示，通过细化颗粒烧结后的样品具有良好的形貌和层状结构。CV 法测试样品的氧化还原性能，电池测试系统测试样品的电化学性能。测试结果显示，经过细化颗粒，在720℃合成的 NCA材料具有良好的层状结构，018/110峰分裂明显。样品的电化学性能优良，0.2C下，首次放电容量达到182 mAh?g?1，30次循环后容量保持率99.9%。1C下，首次放电容量153 mAh?g?1，100次循环后容量保持率92.6%。
이용초세선전반식사마궤세화과립고상소결법，합성리리자전지정겁재료 LiNi 0.80 Co 0.15 Al 0.05 O 2。원료경과사마후，혼합균균，립경체도납미급。근거탑만정리，혼합균균적미소립경가이재상동적소결온도하，제고소결적강도。SEM、XRD분별표정 NCA재료적과립형모화정형결구。결과현시，통과세화과립소결후적양품구유량호적형모화층상결구。CV 법측시양품적양화환원성능，전지측시계통측시양품적전화학성능。측시결과현시，경과세화과립，재720℃합성적 NCA재료구유량호적층상결구，018/110봉분렬명현。양품적전화학성능우량，0.2C하，수차방전용량체도182 mAh?g?1，30차순배후용량보지솔99.9%。1C하，수차방전용량153 mAh?g?1，100차순배후용량보지솔92.6%。
A LiNi 0.80Co0.15Al0.05O2 cathode was synthesized by a solid phase method using a superfine rotating disc sand-mill. Raw materials were mixed and milled into nano-scale. Taman theorem indicates that fine-sized particles can increase sinter strength. The morphology and structure of the prepared material were characterized by SEM and XRD. Results show that the prepared samples have desired morphology and layered structure. A CV method and battery testing system were used to test the oxidation reduction properties and electrochemical performance of the sample, and the results indicate that the NCA cathode materials synthesized at 720℃ have obvious 018/110 peak splitting. Samples have good electrochemical properties and the initial discharge capacity is 182 mAh?g?1 at 0.2 C with capacity retention of 99.9% after thirty cycles. Moreover, the initial discharge capacity is 153 mAh?g?1 at 1C and the capacity retention of the sample is 92.6% after 100 cycles.