Hexagonal Molybdenum Trioxide (h‐MoO₃) as an Electrode Material for Rechargeable Aqueous Aluminum‐Ion Batteries

Abstract

Aqueous aluminum‐ion batteries are at an early development stage and there is a need to discover new electrode materials for the fabrication of high energy density devices. To address this issue, we investigate MoO3 nanowires as a possible electrode material for use in rechargeable Al‐ion batteries that can operate in aqueous conditions. We present a hexagonal structure of MoO3 microrods as an Al‐ion intercalation host material and show its first‐time use as a potential electrode for an aqueous Al‐ion battery system. This yields a discharge capacity of approximately 300 mAh g−1 for 150 cycles and around 90 % retention after 400 cycles at a current density of 3 A g−1. The utilization of this type of material and aqueous electrolytes guarantees both safety during operation and simple recycling of spent batteries.

Bronze-type vanadium dioxide holey nanobelts as high performing cathode material for aqueous aluminium-ion batteries

“…[2][3][4] Very recently, aqueous AIBs are initiated to address the issues of ionic liquids (IL) based AIBs including water and oxygen sensitivity and high cost, meanwhile showing a great potential for ambient fabrication and thus being economically viable. [5][6][7] Until now, a variety of host materials, including transition metal oxide, [8][9][10][11][12][13][14][15] NASICON-type Na 3 V 2 (PO 4 ) 3 , 16 FeVO 4 , 17 and Prussian blue analogues, [18][19][20][21][22] have been reported for aluminium-ion storage. Nevertheless, the high charge density of aluminium-ion remains a critical issue to pursuit the ideal cathode.…”

Rechargeable Al-Metal Aqueous Battery Using NaMnHCF as a Cathode: Investigating the Role of Coated-Al Anode Treatments for Superior Battery Cycling Performance

“…However, AIAB research is still in a nascent stage, with very few theoretical works though none including multiscale simulations, [21][22] and existing challenges at both cathode and anode front. Cathodes suffer from various problems such as low voltage [23][24][25][26][27][28] , poor capacity [29][30][31][32][33][34][35] , rapid cycling decay [36][37][38][39] , and predominant capacitive reaction [40][41] . Though few reports including PBA, 42 graphite 43 , Bi2O3 44 and VOPO4 45 are promising, these studies do not use Al-metal as an anode, thus lack in providing a more realistic scenario of overall battery performance.…”

Growth, characterization and performance of bulk and nanoengineered molybdenum oxides for electrochemical energy storage and conversion

“…The galvanostatic charge/discharge tests of this composite as anode of Li cell exhibit a first reversible capacity of 987 and 739 mAh g -1 after 30 cycles under the current density of 100 mA g -1 in the voltage range of 0.01-3 V vs. Li + /Li. Recently, Joseph et al[354] fabricated MoO3 microrods with hexagonal structure as an Al-ion intercalation host material and show its use as an electrode for an aqueous Al-ion battery. h-MoO3 microrods yield a discharge capacity of ~300 mAh g −1 for 150 cycles at a current density of 3 A g −1 and 90 % capacity retention after 400 cycles.…”