EIS curves of NP-PSC/S and super-P/S electrodes.

A nitrogen-phosphorus dual-doped porous spore carbon (NP-PSC) positive electrode matrix was prepared using native auricularia auricula as solid medium based on the principle of biomass rot. Yeast was introduce and cultured by the auricularia auricula solid medium. The freeze-drying and carbonization activation processes made the materials present a three-dimensional porous spore carbon aerogel properties. Yeast fermentation transformed auricularia auricula from blocky structure to porous structure and introduced nitrogen-phosphorus dual-doping. The physical and chemical properties of the prepared materials were characterized in detail. Electrochemical performance of NP-PSC in Li-S batteries was systematically investigated. Porous structure and heteroatom-doping improved the electrochemical performance, which is much superior to conventional activated carbon materials.</div

Fig 7 -

The cycling performance of NP-PSC/S (a) and super-P/S (b) electrodes at 0.2 C.</p

Fig 2 -

XPS survey (a) and high resolution XPS spectra of Cls (b), N1s (c) and P2p (d) of NP-PSC sample. XPS survey (e) and high resolution XPS spectra of S2p (f) of NP-PSC/S sample.</p

TG curves of NP-PSC/S and elemental sulfur.

A nitrogen-phosphorus dual-doped porous spore carbon (NP-PSC) positive electrode matrix was prepared using native auricularia auricula as solid medium based on the principle of biomass rot. Yeast was introduce and cultured by the auricularia auricula solid medium. The freeze-drying and carbonization activation processes made the materials present a three-dimensional porous spore carbon aerogel properties. Yeast fermentation transformed auricularia auricula from blocky structure to porous structure and introduced nitrogen-phosphorus dual-doping. The physical and chemical properties of the prepared materials were characterized in detail. Electrochemical performance of NP-PSC in Li-S batteries was systematically investigated. Porous structure and heteroatom-doping improved the electrochemical performance, which is much superior to conventional activated carbon materials.</div

Fig 6 -

The cyclic voltammograms (a) and charge-discharge profiles (b) of NP-PSC/S electrode.</p

Fig 4 -

N2 adsorption and desorption isotherms (a) and pore size distribution curves (b) of NP-PSC sample. N2 adsorption and desorption isotherms (c) and pore size distribution curves (d) of NP-PSC/S sample.</p

Fig 8 -

Rate performance of positive electrode NP-PSC/S (a) and super-P/S (b).</p

Fig 3 -

SEM images before fermentation (a ~ b) and after fermentation (c ~ d), TEM images after fermentation (e ~ f) of auricularia auricula carbon samples. TEM images of NP-PSC (g ~ h). SEM results (i) and corresponding elemental mappings of N (j), P (k) and S (l) for NP-PSC/S.</p

XRD patterns of sulfur, NP-PSC and NP-PSC/S samples.

XRD patterns of sulfur, NP-PSC and NP-PSC/S samples.</p

The synthesis process schematic diagram of NP-PSC/S sample.

The synthesis process schematic diagram of NP-PSC/S sample.</p