Activation-free N-doped porous carbon to enhance surface-driven K storage vs intercalation dominated Na storage
Source abstract
Abstract
Abstract Carbonaceous materials show more and more obvious applications in potassium (K) ion battery (KIB) and sodium (Na) ion battery (NaIB) because K and Na have higher reserves than lithium (Li). However, the rate performance and cycle stability of KIBs and NaIBs are still hindered by huge volume change during ions insertion-extraction process and poor kinetics caused by larger volume of K+ and Na+ ions. Compared to graphite and hard carbon, nitrogen (N)-doped porous carbonaceous materials may provide good interfacial wettability and numerous ion transport channels, but low first coulombic efficiency is detrimental to the application of full-battery. Here, N-doped porous carbon (NPC) with a providential specific surface area is synthesized by a facile and activation-free way. Benefiting from N-doping and porous structure, KIBs and NaIBs display an enhanced rate capacity and cycle performance. The storage mechanism and kinetic characteristics of K and Na ion during charge and discharge are also discussed. Comprehensive performance indicates that NPC can obtain a better improvement in surface-driven KIBs than intercalation dominated NaIBs, and can provide some new design concepts for practical applications.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Supercapacitor Materials and Fabrication
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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