Waxberry‐Shaped Ordered Mesoporous P‐TiO2−x Microspheres as High‐Performance Cathodes for Lithium–Sulfur Batteries
Wenna Zhang,
Yuanmei Xu,
Jiabing Liu,
Yebao Li,
Eser Metin Akinoglu,
Yaojie Zhu,
Yongguang Zhang,
Xin Wang,
Zhongwei Chen
Affiliations
Wenna Zhang
South China Academy of Advanced Optoelectronics International Academy of Optoelectronics at Zhaoqing South China Normal University Guangdong 510006 China
Yuanmei Xu
South China Academy of Advanced Optoelectronics International Academy of Optoelectronics at Zhaoqing South China Normal University Guangdong 510006 China
Jiabing Liu
School of Materials Science and Engineering Hebei University of Technology Tianjin 300130 China
Yebao Li
South China Academy of Advanced Optoelectronics International Academy of Optoelectronics at Zhaoqing South China Normal University Guangdong 510006 China
Eser Metin Akinoglu
South China Academy of Advanced Optoelectronics International Academy of Optoelectronics at Zhaoqing South China Normal University Guangdong 510006 China
Yaojie Zhu
South China Academy of Advanced Optoelectronics International Academy of Optoelectronics at Zhaoqing South China Normal University Guangdong 510006 China
Yongguang Zhang
South China Academy of Advanced Optoelectronics International Academy of Optoelectronics at Zhaoqing South China Normal University Guangdong 510006 China
Xin Wang
South China Academy of Advanced Optoelectronics International Academy of Optoelectronics at Zhaoqing South China Normal University Guangdong 510006 China
Zhongwei Chen
Department of Chemical Engineering University of Waterloo Waterloo ON N2L 3G1 Canada
As a candidate for a new generation of inexpensive and high‐performance energy storage systems, lithium–sulfur (Li–S) batteries have attracted widespread research. However, the development and application of Li–S batteries are limited by severe polysulfide dissolution and slow reaction kinetics. Herein, a type of ordered mesoporous P‐TiO2−x microsphere with a waxberry‐like shape as the sulfur host material for Li–S batteries is put forward, which combines the radially arranged mesoporous structure with oxygen defects in the mesoporous framework. In addition, the introduction of phosphorus impurities greatly improves the conductivity of the sulfur electrode, enhances electron mobility, and promotes the interaction between the sulfur species and P‐TiO2−x microspheres. Finally, S/P‐TiO2−x cathodes have achieved a high capacity of 1174.9 mAh g−1 at 0.2C and stable cycling (the average capacity attenuation is only 0.086% per cycle at 1C after 600 cycles).
