Rational Design of 1D Porous Carbon Microtubes Supporting Multi‐size Bi₂O₃ Nanoparticles for Ultra‐long Cycle Life Lithium‐Ion Battery Anodes

Abstract

Multi-size Bi 2 O 3 nanoparticles supported by 1-dimensional (1D) porous carbon microtubes (ms-Bi 2 O 3 /CMTs) were favorably constructed through surface-ion release and in-situ oxidation strategy. The prominent 1D porous microtube materials with multi-size nanoparticles structure can furnish more plentiful electrochemical active sites and shorten lithium storage paths for high-speed redox reactions, which was conducive to ion transport kinetics. The CV tests with various scan rates verified lithium storage mechanism of ms-Bi 2 O 3 /CMTs with diffusion/ capacitance control coexistence. The complexes illustrated an ultra-long cycle life and extraordinary reversible capacity: it still had a specific capacity of 392.6 mAh g À 1 after 3000 cycles at 1 A g À 1 ; and it manifested 546.3 mAh g À 1 when it returned to 0.05 A g À 1 and continued to 100 cycles after experiencing different current densities of 0.05-5 A g À 1 , which indicated that ms-Bi 2 O 3 /CMTs is a prospective anode for lithium-ion batteries (LIBs).

Rational Design of Bismuth Metal Anodes for Sodium-/Potassium-Ion Batteries: Recent Advances and Perspectives

“…A one-dimensional Bi/C composite means that the structure has a high length-todiameter aspect ratio including tubes [44], rods [45,46], wires [47], and other morphologies [48,49] which have been proved to efficiently moderate the material volume expansion effect, improve the structural stability, and enhance the electrochemical performance. After combining 1D carbon nanostructures with Bi metal, the carbon can resist the accumulation of Bi nanoparticles, and the 1D structure can dramatically shorten the ion diffusion distance, thus significantly improving the electrochemical performance.…”