Exploring electrolyte preference of vanadium nitride supercapacitor electrodes

Asymmetric Pseudocapacitors Based on Interfacial Engineering of Vanadium Nitride Hybrids

“…Previous literature have unveiled the pseudocapacitive charge storage mechanism of VN in a KOH electrolyte [ 14 , 15 , 16 ] but the pseudocapacitive charge storage mechanism of VN in the LiCl electrolyte attracts less focus. Ge’s group explored the pseudocapacitive charge storage of VN in LiCl electrolytes and reported the poor pseudocapacitance charge of VN in LiCl compared to KOH electrolytes.…”

“…This is due to its large theoretical capacitance [ 6 , 7 ], suitable working negative potential window [ 8 , 9 , 10 ], excellent electrical conductivity [ 10 ] as well as pseudocapacitive properties [ 11 ]. Considering the electrochemical instability of VN in aqueous solution [ 12 , 13 ], the pseudocapacitance charge storage of VN that varies in different aqueous electrolytes (such as KOH and LiCl) also remains a bottleneck [ 14 , 15 , 16 ]. Recently, the storage mechanism of VN in KOH electrolyte has attracted impressive attention, while the pseudocapacitive function of VN in LiCl electrolyte is still at the infant phase.…”

“…Ge at al. reported that the capacitive charge storage of VN in KOH, LiCl and LiPF 6 are almost the same at a smaller scan rate of 5 mV s −1 , but that of LiCl displays slightly low capacitive contribution at a high scan rate of 50 mV s −1 compared to those of KOH and LiPF 6 [ 14 ]. In addition, VN is electrochemically unstable in neutral LiCl electrolytes but can be significantly improved by using LiCl/polyvinyl alcohol (PVA) gel electrolyte [ 17 ] for the design fabrication of high-performance asymmetric supercapacitors (ASC) devices.…”

Recent advances in biomass‐derived carbon, mesoporous materials, and transition metal nitrides as new electrode materials for supercapacitor: A short review

“…For instance, the charge storage capacitance for VN was approximately 74% in lithium hexafluorophosphate (LiPF 6 ) and approximately 70% in KOH. 78 At 50 mV/s, the capacitance retention in LiPF 6 , KOH, and LiCl 2 were approximately 74%, 70%, and 58%, respectively. Besides, electrochemical performance of VN in LiPF 6 was investigated; when compared to alkaline electrolyte, it enhanced the preference for the electrolyte better than the alkaline did.…”

Effects of ammonolysis and of sol–gel titanium oxide nitride coating on carbon fibres for use in flexible supercapacitors

“…Metal nitrides including TiN, [18][19][20][21][22][23][24][25][26][27][28] VN, [29][30][31][32][33][34][35][36][37][38][39] TiVN, 40 NbN, 41,42 Nb 4 N 5 , 43,44 CrN, 45 Mn 3 N 2 , 46 MoN, 47 Mo 2 N, [48][49][50][51][52] Fe 2 N, 53,54 RuN 55 and WN 56 and GaN 57 are increasingly studied for supercapacitor applications, with higher conductivities than the respective oxides a key driver. In VN the capacity has been found to increase over initial cycles with surface oxide formation and high capacity has been attributed to this surface oxide.…”