writer：王林江，王海
keywords：钠离子电池
source：期刊
specific source：Journal of Materials Science
Issue time：2020年
MoO₃ has become a very promising energy storage material owing to its high theoretical capacity and layered structure. However, MoO₃ suffers from low specific capacitance and fast degradation performance due to pulverization caused by volume change during discharge and charge process. Here, we report the MoO₃ nanoplates (MoO₃ NPs) from Mo-based metal–organic frameworks (Mo-MOFs) via a facile heating treatment. When used as an anode in sodium-ion batteries (SIBs), the material showed 154 mAh g^-1 superior discharge capacity at 50 mAh g^-1 after 1200 cycles. Even at 500 mAh g^-1 , it also showed 217 mAh g^-1 high specific capacity after 500 cycles. This specific MoO₃ material design strategy offers suitable conditions for relieving the volume expansion and provides multiple channels for Na+ transport and electron transfer in MoO₃ during discharge and charge process. This work highlights the importance of MoO₃ nanoplates in preventing the pulverization caused by volume expansion in SIBs.