Synergistically Boosting Li Storage Performance of MnWO₄ Nanorods Anode via Carbon Coating and Additives

Polyanionic structures, (MO₄)^n-_, can be beneficial to the transport of lithium ions by virtue of the open three-dimensional frame structure. However, an unstable interface suppresses the life of the (MO₄)^n--based anode. In this study, MnWO₄@C nanorods with dense nanocavities have been synthesized through a hydrothermal route, followed by a chemical deposition method. As a result, the MnWO₄@C anode exhibits better cycle and rate performance than MnWO₄ as a Li-ion battery; the capacity is maintained at 718 mAh g^-1 at 1000 mA g^-1 after 400 cycles because the transport of lithium ions and the contribution of pseudo-capacitance are increased. Generally, benefiting from the carbon shell and electrolyte additive (e.g., FEC), the cycle performance of the MnWO₄@C electrode is also effectively improved for lithium storage.