97 / 2019-11-05 14:28:45

HIGHLY DISPERSED TUNGSTEN NITRIDE NANOPARTICLES ANCHORED ON 2D-BCN AS ANODES FOR LITHIUM-ION BATTERIES

Transition metal nitrides,Tungsten nitride,Lithium-ion batteries,Porous ternary BCN material

Exploration of anode material with high performance is key for the advancement of lithium ion batteries (LIBs). Herein, we developed an effective in-situ chelating method to synthesize highly dispersed tungsten nitride (WN) quantum dots (2-4 nm) anchored on mesoporous ternary BCN material. The optimized composite (WN@BCN-900) exhibits a high-rate capacity of 504.5 mAh g-1 at a current density of 1 A g-1 and excellent cycling stability with only 2.7% capacity loss after 500 cycles at 1 A g-1 as anode materials for LIBs. This high performance can be synergistically ascribed to the hierarchically porous BCN with unique polar surface and the highly dispersed ultra-small WN nanoparticles, which provide efficient transfer channel for lithium ions and endows high electron conductiviry. This work could provide a new insight into the development of 2D BCN material as high-rate anodes for next-generation LIBs.