Sodium Storage in Coal/Biomass‐Derived Carbon/Carbon 3D Networks

Abstract

Coal plays an important role in human industrialization as a fossil fuel and has attracted attention recently as an ideal carbon precursor for next‐generation sodium‐ion‐battery anode materials. In this work, nitrogen‐doped three‐dimensional (3D) coal‐based carbon materials were constructed, in which coal‐based graphite microcrystals (CGCs) supply plentiful active sites for Na absorption, and chitosan‐derived 3D carbon networks accelerate the electron transfer. The materials exhibited a Na storage capacity of 283.3 mAh g−1 at 0.1 C, with capacitance retention of 94.3 % after the fifth cycle. Moreover, 170 mAh g−1 can be achieved at 2 C after 3000 cycles, which is twice that of pure CGCs. The materials are low cost and exhibit a good capacity, showing that they could be used in practical applications for sodium‐ion‐battery anodes.

CoZn-ZIF-derived carbon-supported Cu catalyst for methanol oxidative carbonylation to dimethyl carbonate

“…The I band at B1220 cm À1 is attributed to the presence of sp 2 -sp 3 bond, disordered graphite lattice or polyene; while the D 00 band at 1500 cm À1 accounts for amorphous carbon. [61][62][63] The peak area ratio of the G and D bands (A G /A D ) can be used to characterize the graphitization degree of the carbon materials. 14 The high A G /A D ratio value indicates the high degree of graphitization of carbon materials, and vice versa.…”

Hard carbon anodes derived from phenolic resin/sucrose cross‐linking network for high‐performance sodium‐ion batteries

“…Various precursors, including biomass, 17 carbohydrates, 18,19 resins 20,21 have been extensively explored to prepare hard carbons. Remarkable progress has been made in hard carbons in the past decade, and the reversible Na‐storage capacity of advanced hard carbon anodes can reach 300 mAh g −1 22 .…”