本研究主要是利用低成本、對環境友好，且具有高理論電容量(525 mAh/g)的草酸鋰作為預置鋰鹽類，將其添加進NMC正極活性材料中，透過其分解後所提供的過量鋰，來解決無陽極(Anode free)鋰金屬電池系統中鋰源匱乏與電容量衰退快速的問題。
本研究主要分為三部分，其一是探討提高草酸鋰添加量對無陽極電池之電化學性能的影響；其二是分析電池在充放電的過程中，草酸鋰分解所產生CO2變化量；其三是透過不同的熱形成(hot formation)方法，來減緩電池電容量衰退的速度。
第一部分透過使用黏度較低之PVDF HSV900黏著劑與將草酸鋰預先進行球磨，藉以改善正極材料之分散性，並得到隨著草酸鋰的添加量增加，放電電容量維持穩定的平台延長，電池的放電電容量保持率隨之提高的電化學結果。未添加草酸鋰之NMC無陽極電池與添加草酸鋰之NMC無陽極電池(NMC：草酸鋰重量比為80：20)相比，放電電容量保持率高於第二圈之50 %的充放電圈數可由13圈提高至86圈，有效地延長電池的循環壽命。
第二部分利用GC-MS分別分析純草酸鋰、純NMC與添加草酸鋰之NMC作為無陽極電池的正極時，充放電的過程中對CO2氣體之產量變化及氣體對鋰沉積之形貌影響。
第三部分是嘗試三種不同的熱形成程序，藉以提升電池之電容量保持率，並觀察不同方法對電化學結果之影響。

This research is to study lithium oxalate as a prelithiated salt to improve the capacity retention of anode-free batteries, because of its low cost, environmental beingness, and high theoretical capacity (525 mAh/g). Adding lithium oxalate into NMC cathode material to provide excess lithium source is expected to solve the shortage of lithium and reduce capacity fading.
This research consists of three parts. First, the influence of electrochemical performance by increasing the amount of lithium oxalate additive was studied. Second, the CO2 production caused by lithium oxalate decomposition was analyzed during cycling. The third part is using different method to reduce the capacity fading by a hot formation.
PVDF HSV900 with low viscosity was selected as the binder and ball-milled with lithium oxalate to improve their dispersion in the cathode material. From the electrochemical results, the discharge capacity retention of the cell indeed increased as the amount of lithium oxalate additive increased. Compared to bare NMC cell, the discharge capacity retention reaching 80 % of its original value could be significantly increased from 13 cycles to 86 cycles, when 20 wt% prelithiated salt was added in the cell (NMC: lithium oxalate (80:20)). GC-MS was applied to analyze CO2 production during cycling. Finally, three different hot formation methods were studied to observe the effects of hot formation on their electrochemical performance.

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