High Reversible Pseudocapacity in Mesoporous Yolk–Shell Anatase TiO2/TiO2(B) Microspheres Used as Anodes for Li‐Ion Batteries

• DOI: 10.1002/adfm.201703270
• Publication Date: 2017-10-16T11:20:47Z
• Authors: Hao Wei; Erwin F. Rodriguez; Anthony F. Hollen...; Anand I. Bhatt; Dehong Chen; Rachel A. Caruso
• Keywords: Titanium Dioxide; Nanomaterials

Abstract As an anode material for lithium‐ion batteries, titanium dioxide (TiO 2 ) shows good gravimetric performance (336 mAh g −1 LiTiO and excellent cyclability. To address the poor rate behavior, slow (Li + diffusion, high irreversible capacity decay, TiO nanomaterials with tuned phase compositions morphologies are being investigated. Here, a promising is prepared that comprises mesoporous “yolk–shell” spherical morphology in which core anatase shell (B). The preparation employs NaCl‐assisted solvothermal process electrochemical results indicate yolk–shell microspheres have specific reversible at moderate current (330.0 C/5), (181.8 40C), impressive cyclability (98% retention after 500 cycles). superior properties attributed to (B) nanosheet shell, provides additional active area stabilize pseudocapacity. In addition, open improves diffusion of electrolyte throughout electrode, thereby contributing directly greatly improved capacity.