Preparation and lithium storage performance of novel nitrogen-doped porous carbon/S cathode
Because nitrogen-doped porous carbon(N—C)may limit the shuttling effect and polysulfide dissolution,they hold great promise as sulphur carrier materials for lithium-sulfur batteries.In this work,N—C networks produced from a melamine-based organic polymer(SNW-1)were successfully created by high-temperature annealing,and N—C/S was successfully prepared as a sulphur carrier material.The shape and structure of N—C/S were characterised using X-ray diffractometer(XRD),Raman spectrometer(Raman),infrared spectrometer(FTIR),scanning electron microscope(SEM),transmission electron microscope(TEM),and thermogravimetric analyze(TGA).The N-C/S cathode material shows good rate performance(discharge specific capacities of 1 102,958,808,721,536,and 428 mAh/g at current densities of 167.2,334.4,836,1672,3344,and 8 360 mA/g,respectively)and excellent cycling performance(709 mAh/g after 500 cycles at 334.4 mA/g,with a decay of 0.09％per cycle).
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