Apically guiding electron/mass transfer reaction induced by Ag/FeNx Mott-Schottky effect within a hollow star reactor toward high performance zinc-air batteries

Shi，Kaixiang1,2; Wang，Kaixin2; Li，Tong2; Li，Junhao2; Ren，Jie2; Li，Xu3; Min，Yonggang4; Lu，Zhouguang5; Tan，Wei1,2; Liu，Quanbing1,2

2024-08-01

10.1016/j.jechem.2024.03.040

Journal of Energy Chemistry   影响因子和分区

2095-4956

The disparity in the transfer of carriers (electrons/mass) during the reaction in zinc-air batteries (ZABs) results in sluggish kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), along with elevated overpotentials, thereby imposing additional constraints on its utilization. Therefore, the pre-design and target-development of inexpensive, high-performance, and long-term stable bifunctional catalysts are urgently needed. In this work, an apically guiding dual-functional electrocatalyst (Ag-FeN-N-C) was prepared, in which a hierarchical porous nitrogen-doped carbon with three-dimensional (3D) hollow star-shaped structure is used as a substrate and high-conductivity Ag nanoparticles are coupled with iron nitride (FeN) nanoparticles. Theoretical calculations indicate that the Mott-Schottky heterojunction as an inherent electric field comes from the two-phase bound of Ag and FeN, of which electron accumulation in the FeN phase region and electron depletion in the Ag phase region promote orientated-guiding charge migration. The effective modulation of local electronic structures felicitously reforms the d-band electron-group distribution, and intellectually tunes the mass-transfer reaction energy barriers for both ORR/OER. Additionally, the hollow star-shaped hierarchical porous structure provides an apical region for fast mass transfer. Experimental results show that the half-wave potential for ORR is 0.914 V, and the overpotential for OER is only 327 mV at 10 mA cm. A rechargeable ZAB with Ag-FeN-N-C as the air cathode demonstrates long-term cycling performance exceeding 1500 cycles (500 h), with a power density of 180 mW cm. Moreover, when employing Ag-FeN-N-C as the air cathode, flexible ZABs demonstrate a notable open-circuit voltage of 1.42 V and achieve a maximum power density of 65.6 mW cm. Ag-FeN-N-C shows guiding electron/mass transfer route and apical reaction microenvironment for the electrocatalyst architecture in the exploration prospects of ZABs.

Apically guiding effect Bifunctional catalysis Hollow star structure Mott-Schottky effect Zinc-air batteries

SCI ; EI

英语

其他

20241615917527

Cathodes ; Doping (additives) ; Electric fields ; Electrolytic reduction ; Electrons ; Flexible electronics ; Iron compounds ; Mass transfer ; Open circuit voltage ; Oxygen ; Reaction kinetics ; Silver ; Silver nanoparticles ; Stars ; Zinc ; Zinc air batteries

Ore Treatment:533.1 ; Zinc and Alloys:546.3 ; Precious Metals:547.1 ; Mass Transfer:641.3 ; Extraterrestrial Physics and Stellar Phenomena:657.2 ; Electricity: Basic Concepts and Phenomena:701.1 ; Secondary Batteries:702.1.2 ; Electronic Equipment, General Purpose and Industrial:715 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804

2-s2.0-85190152860

Scopus

1.Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center (Rongjiang Laboratory),Guangdong University of Technology,Jieyang,Guangdong,515200,China
2.Guangzhou Key Laboratory of Clean Transportation Energy Chemistry,Guangdong Provincial Key Laboratory of Plant Resources Biorefinery,School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou,Guangdong,510006,China
3.Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan Province,School of Chemistry and Chemical Engineering,Hainan Normal University,Haikou,Hainan,571158,China
4.School of Materials and Energy,Guangdong University of Technology,Guangzhou,Guangdong,510006,China
5.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China

Shi，Kaixiang,Wang，Kaixin,Li，Tong,et al. Apically guiding electron/mass transfer reaction induced by Ag/FeNx Mott-Schottky effect within a hollow star reactor toward high performance zinc-air batteries[J]. Journal of Energy Chemistry,2024,95:106-116.

Shi，Kaixiang.,Wang，Kaixin.,Li，Tong.,Li，Junhao.,Ren，Jie.,...&Liu，Quanbing.(2024).Apically guiding electron/mass transfer reaction induced by Ag/FeNx Mott-Schottky effect within a hollow star reactor toward high performance zinc-air batteries.Journal of Energy Chemistry,95,106-116.

Shi，Kaixiang,et al."Apically guiding electron/mass transfer reaction induced by Ag/FeNx Mott-Schottky effect within a hollow star reactor toward high performance zinc-air batteries".Journal of Energy Chemistry 95(2024):106-116.