Facile synthesis of hierarchical polycystic iron-nitride/phosphide hybrids microsphere constructed by CNTs for stable and enhanced lithium storage. Issue 1 (January 2019)

• Record Type: Journal Article
• Authors: Jing, Peng; Wang, Qiong; Wang, Boya; Xiang, Mingwu; Jiang, Hongjun; Zhang, Yin; Wei, Yunhong; Zhang, Yun; Wu, Hao; Liu, Heng
• Is Part Of: Ceramics international. Volume 45:Issue 1(2019)
• Page Start: 216
• Page End: 224
• Publication Date: 2019-01
• Subjects: Lithium ion batteries -- Anode material -- Spray-drying -- Iron-nitride -- Iron-phosphide; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.09.154
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Diverse Fe-based nitrides and phosphides have drawn considerable attention owing to their abundant source, high theoretical capacities, and environment benignity. However, it still remains a crucial challenge to develop a facile preparation approach of robust Fe-based anode materials for the next-generation durable lithium-ion batteries. Herein, we constructed two type polycystic microsphere anode materials (Fe2 N@C/CNTs and FeP@C/CNTs) through a scalable industrial spray-drying technology combined with following chemical nitridation/phosphorization conversion strategy. Both the resultant Fe2 N@C/CNTs and FeP@C/CNTs materials exhibit unique hierarchical polycystic microsphere structure and improved conductive network caused by the incorporation of amorphous carbon and dense CNTs coating layers. The unique structure merits endow these capabilities of facilitating electrons/ions transport and accommodating notorious volume change during charge-discharge cycling. Consequently, the Fe2 N@C/CNTs and FeP@C/CNTs anode materials deliver enhanced rate capability (216 and 232 mA h g −1, respectively, at a high current density of 5 A g −1 ) and durable cycling stability with reversible capacities of 489 and 571 mA h g −1 at 0.5 A g −1 after 500 cycles, respectively. In addition, this work also provides a transplantable preparation strategy for other conversion-type anode materials with poor electrical conductivity and large volume effect.