本研究為利用含鋰物質分解出鋰離子的特性，應用於預置鋰的技術上，對全電池充電將分解所得之鋰離子嵌入至全電池負極中，並於放電時將嵌回正極，可將不含鋰離子之正極材料應用於鋰電池系統中。在10 mA/gx電流密度對含鋰物質充電以含鋰物質：導電碳：黏著劑重量比= 30：60：10之組合有最高的轉化率約200 mAh/gmixture及最低的過電位約4 V。再者，以50 mA/gx的電流密度進行充電時間為10 小時內(約0.1 C)，電容量約為410 mA/gX，過電位約為4.2 V。接著探討不含鋰之負極材料---二氧化鈦之電化學表現，其在經400oC鍛燒後有最佳之循環壽命，在0.1 C的充放電速率下其可逆電容量約為200 mAh/gTiO2且循環50圈後維持率仍有99%，且在變速率條件下依然有最佳的表現。將含鋰物質與二氧化鈦混合進行半電池測試時，預置鋰放電階段會有副反應發生，其效應尤以將含鋰物質/二氧化鈦正極與石墨化中間相碳微珠(MCMB)負極組成全電池後更為顯著，其會持續消耗鋰離子並影響電化學表現。然將電池在預置鋰充電階段後拆解重組可改善此現象；亦嘗試使用於碳硫複合物系統中，然加入N-甲基吡咯烷酮(NMP)後碳硫複合物硫與含鋰物質會轉變成Li2SO4•H2O，其形成機制仍須進一步探討。

In this research, the decomposable characteristic of lithium compound into Li+ is applied to prelithiation technique in our research. During full cell charging, Li+ released from lithium compound will intercalate into anode material and return to cathode material during discharging. In this way, non-lithiated cathode material can be applied in the system of lithium ion battery. By charging lithium compound electrode with current density of 10 mA/gx, the weight ratio combination of lithium compound: conductive carbon: binder= 30: 60: 10 stands out to have the best conversion of approximately 200 mAh/gmixture and the lowest overpotential, 4 V. Furthermore, by applying the current density of 50 mA/gx, the charging time is nearly 10 hours, which equals to 0.1 C, and produce 410 mAh/gx. Next, we investigated the electrochemical performance of TiO2, the cathode material we selected, and observed that after being annealed at 400oC, it has the best cycling performance at 0.1 C , of which reversible capacity is 200 mAh/g and the retention is 99% after cycling for 50 cycles, and has the best rate capability. During the half cell test of Lihium compound/TiO2, side reactions occured during discharging period of prelithiation, and the effect is more significant in the full cell of lithium compound/TiO2 and MCMB, which consumes Li+ and affecting electrochemical performance,. After disassembling and reassembling the cell after prelithiation charging process, the phenomenon is improved. We also applied the technique in C/S system, but NMP might cause C/S and lithium compound to react to become Li2SO4•H2O, and the mechanism needs to be further investigated.

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