Reversible Al3+ ion insertion into tungsten trioxide (WO3) for aqueous aluminum-ion batteries

Can electrochemical Al3+ ions be reversibly intercalated in tungsten trioxide (WO3) in aqueous electrolytes? Here, we address this particular question and demystify that Al3+ ions can indeed be intercalated and deintercalated in WO3 in certain Al3+ ion conducting aqueous electrolytes.