TY - JOUR
T1 - Modified H2V3O8 to Enhance the Electrochemical Performance for Li-ion Insertion
T2 - the Influence of Prelithiation and Mo-Substitution
AU - Söllinger, Daniela
AU - Karl, Michael
AU - Redhammer, Günther
AU - Schoiber, Jürgen
AU - Werner, Valerie
AU - Zickler, Gregor
AU - Pokrant, Simone
N1 - © 2020 The Authors. ChemSusChem published by Wiley-VCH GmbH.
PY - 2020
Y1 - 2020
N2 - Nanostructured H
2 V
3 O
8 is a promising high-capacity cathode material, suitable not only for Li
+ but also for Na+, Mg
2+ , and Zn
2+ insertion. However, the full theoretical capacity for Li
+ insertion has not been demonstrated experimentally so far. In addition, improvement of cycling stability is desirable. Modifications like substitution or prelithiation are possibilities to enhance the electrochemical performance of electrode materials. Here, for the first time, the substitution of vanadium sites in H
2 V
3 O
8 with molybdenum was achieved while preserving the nanostructure by combining a soft chemical synthesis approach with a hydrothermal process. The obtained Mo-substituted vanadate nanofibers were further modified by prelithiation. While pristine H
2 V
3 O
8 showed an initial capacity of 223 mAh g
-1 and a retention of 79 % over 30 cycles, combining Mo substitution and prelithiation led to a superior initial capacity of 312 mAh g
-1 and a capacity retention of 94 % after 30 cycles.
AB - Nanostructured H
2 V
3 O
8 is a promising high-capacity cathode material, suitable not only for Li
+ but also for Na+, Mg
2+ , and Zn
2+ insertion. However, the full theoretical capacity for Li
+ insertion has not been demonstrated experimentally so far. In addition, improvement of cycling stability is desirable. Modifications like substitution or prelithiation are possibilities to enhance the electrochemical performance of electrode materials. Here, for the first time, the substitution of vanadium sites in H
2 V
3 O
8 with molybdenum was achieved while preserving the nanostructure by combining a soft chemical synthesis approach with a hydrothermal process. The obtained Mo-substituted vanadate nanofibers were further modified by prelithiation. While pristine H
2 V
3 O
8 showed an initial capacity of 223 mAh g
-1 and a retention of 79 % over 30 cycles, combining Mo substitution and prelithiation led to a superior initial capacity of 312 mAh g
-1 and a capacity retention of 94 % after 30 cycles.
KW - electrochemistry
KW - H2V3O8
KW - hydrothermal synthesis
KW - Li-ion battery (LIB)
KW - synthesis design
UR - https://resolver.obvsg.at/urn:nbn:at:at-ubs:3-26001
U2 - 10.1002/cssc.202002757
DO - 10.1002/cssc.202002757
M3 - Article
C2 - 33337578
SN - 1864-564X
VL - 14
SP - 1112
EP - 1121
JO - CHEMSUSCHEM
JF - CHEMSUSCHEM
IS - 4
ER -