|   样品  |       首次放电比容量/mAh  |       50次放电比容量/mAh  |       循环保持率/%  |    
|   a  |       98.29  |       65.60  |       66.74  |    
|   b  |       99.34  |       70.87  |       71.34  |    
|   c  |       100.27  |       74.70  |       74.50  |    
|   d  |       110.95  |       85.45  |       77.02  |    
|   e  |       116.82  |       82.65  |       70.75  |    
|   f  |       95.57  |       66.09  |       69.15  |    
|   g  |       107.19  |       70.67  |       65.93  |