Mesoporous vanadium nitride as anion storage electrode for reverse dual-ion hybrid supercapacitor

Ultrafine VN quantum dots modified with a nitrogen-doped reduced graphene oxide anode material for enhanced rate capability and lifespan of lithium-ion batteries

“…Specifically, VN has emerged as a potential anode material for LIBs, owing to its high electroconductibility (about 10 6 O À1 m À1 ), wide lithiation potential range (0.01-3 V), substantial theoretical capacity (approximately 1043 mA h g À1 ), and resistance to moisture and chemical corrosion. [17][18][19][20][21] Unfortunately, like several anode materials, VN materials are generally accompanied by a huge volume change (E240% for LIBs) during cycle processes, leading to compromised rate and cycle stability performance for lithium storage. [22][23][24] Thus, to overcome these issues, the fabrication of low-dimensional nanoscale VN becomes necessary to mitigate large volume expansion, increase the active sites, promote ion mass transport, and reduce the electrolyte ion diffusion distance, ultimately improving the rate and long-cycle stability performance for lithium storage.…”

Surface Redox Pseudocapacitance Boosting Vanadium Nitride for High‐Power and Ultra‐Stable Potassium‐Ion Capacitors

“…[ 21–25 ] Among them, vanadium nitride (VN) has an electrical conductivity of 1.17 × 10 6 S m –1 , even higher than 3 × 10 5 S m –1 of graphite, and is resistant to moisture and chemical corrosion, which has triggered tremendous research interest in electrochemical energy storage. [ 24,26–28 ] VN has been numerously reported in lithium storage as a conversion‐type anode material with high capacities over 800 mAh g –1 ; [ 29–32 ] however, there are a few reports about VN for electrochemical potassium storage. [ 33 ] For example, VN quantum dots encapsulated in carbon micro‐sheets have delivered a moderate capacity of 228 mAh g –1 at 0.1 A g –1 .…”

“…[21][22][23][24][25] Among them, vanadium nitride (VN) has an electrical conductivity of 1.17 × 10 6 S m -1 , even higher than 3 × 10 5 S m -1 of graphite, and is resistant to moisture and chemical corrosion, which has triggered tremendous research interest in electrochemical energy storage. [24,[26][27][28] VN has been numerously reported in lithium storage as a conversion-type…”