Integrating PtNi nanoparticles on NiFe layered double hydroxide nanosheets as a bifunctional catalyst for hybrid sodium-air batteries

Yu, Xueqing1; Kang, Yao1; Wang, Shuo1; Hui, Kwan San2; Hui, Kwun Nam1; Zhao, Huajun1,3; Li, Jianding1; Li, Bo1; Xu, Jincheng1; Chen, Liang4,5; Shao, Huaiyu1

2020-08-28

10.1039/d0ta04602g

Journal of Materials Chemistry A   影响因子和分区

2050-7488

2050-7496

Hybrid sodium-air batteries (HSABs) are emerging systems for next-generation energy storage owing to their high theoretical energy density, high specific capacity, low cost, and environmental friendliness. However, the ungratified energy efficiency, large overpotential, and poor cycling stability associated with the sluggish oxygen reduction reaction/oxygen evolution reaction (ORR/OER) at air electrodes hamper their further development. Herein, we report a facile electrodeposition method to construct three-dimensional nickel defect-rich nickel-iron layered double hydroxide nanosheets decorated with platinum-nickel alloyed nanoparticles grown on macroporous nickel foam substrates (PtNi/NixFe LDHs) as a binder-free electrocatalyst. The optimal catalyst (Pt3Ni1/NixFe LDHs) demonstrates a low overpotential (265 mV at the current density of 10 mA cm(-2)), a small Tafel slope (22.2 mV dec(-1)) towards the OER and a high half-wave potential (0.852 V) for ORR, as well as superior long-term stability in comparison to commercial catalysts. Theoretical calculations revealed that the Ni-top site of Pt3Ni1/NixFe LDHs works as an active site for enhanced OER/ORR activities. The fabricated HSAB with Pt3Ni1/NixFe LDHs as the air cathode displayed not only an initial low overpotential gap (0.50 V) but also superior rechargeability and structure stability with high round-trip efficiency (similar to 79.9%) of over 300 cycles. These results provide a novel design of bifunctional and binder-free catalyst as the cathode for metal-air batteries.

SCI ; EI

英语

其他

Science and Technology Development Fund of the Macau SAR[FDCT 0062/2018/A2][FDCT 0191/2017/A3][FDTC 0021/2019/AIR][FDCT 0041/2019/A1][FDCT 0046/2019/AFJ] ; Multi-Year Research Grants from the University of Macau[MYRG2019-00055-IAPME][MYRG2017-00216-FST][MYRG2018-00192-IAPME]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000561168500020

ROYAL SOC CHEMISTRY

20204309399983

Binders ; Cathodes ; Iron alloys ; Electrocatalysts ; Iron compounds ; Nanoparticles ; Platinum alloys ; Nanosheets ; Secondary batteries ; Electrolytic reduction ; Nickel alloys ; Nickel compounds

Ore Treatment:533.1 ; Iron Alloys:545.2 ; Precious Metals:547.1 ; Nickel Alloys:548.2 ; Secondary Batteries:702.1.2 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Solid State Physics:933

Web of Science

1.Univ Macau, Joint Key Lab, Minist Educ, Inst Appl Phys & Mat Engn, Ave Univ, Taipa, Macao, Peoples R China
2.Univ East Anglia, Engn Fac Sci, Norwich NR4 7TJ, Norfolk, England
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
4.Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Yu, Xueqing,Kang, Yao,Wang, Shuo,et al. Integrating PtNi nanoparticles on NiFe layered double hydroxide nanosheets as a bifunctional catalyst for hybrid sodium-air batteries[J]. Journal of Materials Chemistry A,2020,8(32):16355-16365.

Yu, Xueqing.,Kang, Yao.,Wang, Shuo.,Hui, Kwan San.,Hui, Kwun Nam.,...&Shao, Huaiyu.(2020).Integrating PtNi nanoparticles on NiFe layered double hydroxide nanosheets as a bifunctional catalyst for hybrid sodium-air batteries.Journal of Materials Chemistry A,8(32),16355-16365.

Yu, Xueqing,et al."Integrating PtNi nanoparticles on NiFe layered double hydroxide nanosheets as a bifunctional catalyst for hybrid sodium-air batteries".Journal of Materials Chemistry A 8.32(2020):16355-16365.