High performance lithium sulfur batteries with a cassava-derived carbon sheet as a polysulfides inhibitor

Abstract

With the insertion of CCS interlayers the performance of Li–S cells is remarkably enhanced.

Microporous carbon nanosheets derived from corncobs for lithium–sulfur batteries

“…For example, activated carbon from pomelo peels [29], pig bones [30], fish scale [31], litchi shells [32], cassava [33], coconut shells [34]. Though a great progress has been made on the improvement of the electrochemical performance of activated carbon, it still remains a challenge to find a carbon resource with abundant supply and low-cost that can form suitable morphology for fast ion/electron transportation as cathode for Li-S batteries.…”

Biomass-derived renewable carbon materials for electrochemical energy storage

“…For lithium-sulfur battery applications, these C/S composites are able to manipulate 'shuttle effects' for better stability, while larger pores to facilitate ion transportation for improving rate performance. To date, all kinds of biomass precursors, such as pig bone [142], fish scales [66], shrimp shell [143], litchi shells [144], olive stones [145], cotton [146], silk cocoon [147], bamboo [148], wheat straw [149], mango stone [150], pomelo peels [151], banana peels [152], gelatin [153], cassava [154], bark of plane trees [155], starch [156], have been widely explored to prepare hierarchical porous carbons by well-deigned carbonization processes. All of these biomass-derived hierarchical carbons can be used as conductive host of sulfur for lithium-sulfur battery with improved electrochemical performances.…”

Polysulfide Binding to Several Nanoscale Magnéli Phases Synthesized in Carbon for Long‐Life Lithium–Sulfur Battery Cathodes

“…The narrow linewidth of the (reactionr ate) peaks confirmgood electricalc ontact andi nsignificant overcharging behavior, which was restricted as much as possible by maintaining ad ischarge voltagew indow between 1.8 and 2.6 V. Impedance spectroscopic data in Figure 6f of the as-assembled cell at open-circuit potential, and after five cycles of charging and discharging, also corroborates the cyclic-voltammetry and overall cell-testing findings. [56,57] The response also indicates au niform distribution of sulfur,w hich was confirmed by EDS mapping of exhausted electrodes( see Figure 6a-d). Noteworthy is the stable, highly conductive nature of the cycled cathode materials, which comprise metallic (Ti 4 O 7 )a sw ell as semiconducting (Ti 6 O 11 )a nd other Ti n O 2nÀ1 phases.O nc ycling, the charge-transfer resistance is reduced from 83 to 15 W,s ignifyingr eliable solid-electrolyte interface (SEI) layer formation.…”