Abstract
Significant efforts have recently been devoted to developing commercially viable high-capacity and low-cost lithium sulfur (Li-S) batteries. In this paper, we report Na-X zeolite templated porous carbon (ZPC) filled with sulfur as a cathode material for Li-S batteries. To immobilize liquid Li sulfide, the surface of NCP was modified by amphiphilic N-polyvinylpyrrolidone (PVP), making ZPC amphiphilic (denoted as A-ZPC). ZPC, A-ZPC and their corresponding composites with sulfur (ZPC-S and A-ZPC-S) were analyzed by various physical characterizations, charge-discharge profiling and electrochemical impedance spectroscopy (EIS). The results showed excellent performance of the A-ZPC-S composite cathode with 46 wt% sulfur loading, a specific capacity can be retained at 691 mA h g-1 even after 300 cycles under a rate of 1C, fading only 0.142% per cycle.
| Original language | English |
|---|---|
| Pages (from-to) | 9117-9123 |
| Number of pages | 7 |
| Journal | RSC Advances |
| Volume | 6 |
| Issue number | 11 |
| DOIs | |
| State | Published - 2016 |
| Externally published | Yes |
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