Modified KBBF-like Material for Energy Storage Applications: ZnNiBO3(OH) with Enhanced Cycle Life

作者：Hussain, Iftikhar; Hussain, Tanveer; Ahmad, Muhammad; Ma, Xiaoxia; Javed, Muhammad Sufyan; Lamiel, Charmaine; Chen, Yatu; Ahuja, Rajeev; Zhang, Kaili^*

来源：ACS applied materials & interfaces, 2022, 14(6): 8025-8035.

DOI：10.1021/acsami.1c23583

• Be-free KBBF
• nontoxic KBBF
• ZnNiBO3(OH)
• cycle stability
• high-energy density

Not only are new and novel materials sought for electrode material development, but safe and nontoxic materials are also highly being intensively investigated. Herein, we prepare ZnNiBO3(OH) (ZNBH), a modified and Be-free KBe2BO3F2 (KBBF) family member as an effective electrode material. The novel ZNBH resembles the KBBF structure but with reinforced structure and bonding, in addition to well-incorporated conductive metals benefiting supercapacitor applications. The enhanced electronic properties of ZNBH are further studied by means of density functional theory calculations. The as-prepared ZNBH electrode material exhibits a specific capacity of 746 C g(-1) at a current density of 1 A g(-1). A hybrid supercapacitor (HSC) device is fabricated and successfully illuminated multiple color LEDs. Interestingly, even after being subjected to long charge-discharge for 10 000 cycles, the ZNBH//AC HSC device retains 97.2% of its maximum capacity, indicating the practicality of ZNBH as an electrode material.

• 单位
  兰州大学