Pompon-villus shaped hydrogen titanate/anatase with heterostructure for superior sodium storage.

Searching for affordable and efficient anode materials is of great significance for the development of sodium-ions batteries. Anatase-based electrode material has demonstrated reasonably voltage and outstanding cyclability. However, low specific capacity and poor Na+ transmission efficiency of conventionally prepared anatase material restrain its practical application. To achieve anatase-based electrode material with superior sodium storage, pompon-villus shaped hydrogen titanate/anatase composite with heterostructure is synthesized by a facile method. Thanks to the cooperative effect of unique pompon-villus architecture, open channel of hydrogen titanate, and specific heterostructure, the synthesized composite displays excellent rate performance and long cycle performance: the discharge specific capacity is remains 157.8 mAh·g−1 after 200 cycles at 0.1 A·g−1, and the discharge specific capacity is maintaining 104.1 mAh·g−1 after 1000 cycles at 2 A·g−1. This work supplies new fundamental strategy and paves an encouraging avenue in designing anatase-based electrode with improved electrochemical performance for sodium-ions batteries. [Display omitted] • Pompon-villus shaped hydrogen titanate/anatase was prepared for the first time. • Heterostructure was constructed between hydrogen titanate and anatase. • As-obtained hydrogen titanate/anatase showed good electrochemical performances. [ABSTRACT FROM AUTHOR]