Biomass bone-derived, N/P-doped hierarchical hard carbon for high-energy potassium-ion batteries. (July 2021)

• Record Type: Journal Article
• Authors: Yuan, Xiaomin; Zhu, Bo; Feng, Jinkui; Wang, Chengguo; Cai, Xun; Qin, Rongman
• Is Part Of: Materials research bulletin. Volume 139(2021)
• Publication Date: 2021-07
• Subjects: A. Nanostructures -- D. Electrochemical properties; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2021.111282
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Hierarchically porous chicken bone-derived carbon scaffold was adopted as PIBs anode. The anode exerted outstanding initial capacity and superior cyclic performance. The increased interlayer spacing and heteroatom doping facilitated capacity stability. Abstract: As a potential candidate of current power supply, potassium ion batteries (PIBs) based on biomass-derived porous carbons are endowed with advantages of low cost, improved energy density, high safety, and long cycling lifespan. Herein, endeavors addressing biomass bone-based anodes for PIBs were devoted to enhance the intercalation chemistry of K + . Through a direct pyrolysis of biomass chicken bones without adding any activation agent, 3D porous carbon scaffold (3D-HPCS) with hierarchical nanostructure and heteroatoms doping was adopted as PIBs anode to realize excellent rate capability and cycle life. The prepared 3D-HPCS anode exerted an outstanding initial capacity of 470 mA h g −1 as well as a rate capacity of 113 mA h g -1 at 2.0 C. Meanwhile, it remained 205 mA h g -1 after 450 cycles at a current density of 0.2 C, which demonstrated superior rate performance and cyclic stability during K + insertion/extraction. The remarkable performances could be mainly attributed to the comprehensively synergistic contributions of increased interlayer spacing, active heteroatom doping, and intricate porous structures of 3D-HPCS electrode, thereby improving electronic conductivity and ion diffusion kinetics.