I am working on room temperature sodium sulfur batteries with carbon-based cathode. I have tried many carbonaceous materials like microporous carbon, cnt etc which were reported in literature. But in every case, I get very high charging capacity and low discharge capacity. Ex. In a paper, for CNT-S composite, they reported a capacity of ~500 mAh/g at 0.1 C whereas I got 140 mAh/g at 0.01C, even though I followed the exact same procedure.
Please help me in understanding why I am getting such high charging capacities and so low discharging capacities. The electrolyte Im using is 1 M NaClO4 in TEGDME and Na metal foil as anode. I`ve put the charge-discharge curve of my battery.
Y Sai Swaroop Sarma You can think about it. But there is clearly not enough information. What membrane is used?
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