仍待解决的问题
Problems that remain to be solved
以上为机器翻译结果，长、整句建议使用 人工翻译 。
目前解决该问题采用最多的方法是阳离子掺杂，但是该方法总是以降低材料的初始容量为代价，所以阳离子掺杂方法仍待改进。
Through the most widely adopted method to overcome the problems was cation substitution, the improvement on cyclability was at the cost of initial capacity, so the method need to be made better.
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