Metal-free Surface-microporous Graphene Electrocatalysts from CO2 for Rechargeable All-Solid-State Zinc-Air Batteries

2021 ◽  
Author(s):  
Jie Deng ◽  
Lei Wang ◽  
Fangming Jin ◽  
Yun Hang Hu
Keyword(s):  
Free Surface ◽  
Solid State ◽  
Liquid Alloy ◽  
Air Cathode ◽  
Metal Free ◽  
Zinc Air Batteries

A novel surface-microporous graphene (SMG), which was synthesized directly from CO2 via its reaction with Na/K liquid alloy, was demonstrated as a robust metal-free electrocatalyst for the air cathode of...

Nitrogen-Doped Co3 O4 Mesoporous Nanowire Arrays as an Additive-Free Air-Cathode for Flexible Solid-State Zinc-Air Batteries

2017 ◽  
Vol 29 (15) ◽  
pp. 1602868 ◽  
Author(s):  
Minghao Yu ◽  
Zhengke Wang ◽  
Cheng Hou ◽  
Zilong Wang ◽  
Chaolun Liang ◽  
...  
Keyword(s):  
Solid State ◽  
Nanowire Arrays ◽  
Air Cathode ◽  
Nitrogen Doped ◽  
Free Air ◽  
Zinc Air Batteries

Self-supported N-doped CNT arrays for flexible Zn–air batteries

2020 ◽  
Vol 8 (35) ◽  
pp. 18162-18172 ◽  
Author(s):  
Lina Liu ◽  
Xiao Zhang ◽  
Feng Yan ◽  
Bo Geng ◽  
Chunling Zhu ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Solid State ◽  
Carbon Fiber ◽  
Nanotube Arrays ◽  
Air Cathode ◽  
Carbon Nanotube Arrays ◽  
Carbon Fiber Cloth ◽  
Cnt Arrays ◽  
Zinc Air Batteries

N-Doped carbon nanotube arrays with encapsulated CoFe nanoparticles were directly grown on carbon fiber cloth as a self-supported air-cathode for flexible solid-state zinc–air batteries which can work even under extreme bending conditions.

Mn-based spinels evolved from layered manganese dioxides at mild temperature for the robust flexible quasi-solid-state zinc-air batteries

2021 ◽  
Vol 417 ◽  
pp. 129179
Author(s):  
Bin Chen ◽  
He Miao ◽  
Mingming Yin ◽  
Ruigan Hu ◽  
Lan Xia ◽  
...  
Keyword(s):  
Solid State ◽  
Mild Temperature ◽  
Zinc Air Batteries

scholarly journals Giant room temperature elastocaloric effect in metal-free thin-film perovskites

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Cheng Li ◽  
Yu Hui Huang ◽  
Jian-Jun Wang ◽  
Bo Wang ◽  
Yong Jun Wu ◽  
...  
Keyword(s):  
Thin Films ◽  
Solid State ◽  
Room Temperature ◽  
Entropy Change ◽  
Stress Change ◽  
Chemical Doping ◽  
Metal Free ◽  
Organic Ferroelectrics ◽  
Potential Applications ◽  
Unit Stress

AbstractSolid-state refrigeration which is environmentally benign has attracted considerable attention. Mechanocaloric (mC) materials, in which the phase transitions can be induced by mechanical stresses, represent one of the most promising types of solid-state caloric materials. Herein, we have developed a thermodynamic phenomenological model and predicted extraordinarily large elastocaloric (eC) strengths for the (111)-oriented metal-free perovskite ferroelectric [MDABCO](NH4)I3 thin-films. The predicted room temperature isothermal eC ΔSeC/Δσ (eC entropy change under unit stress change) and adiabatic eC ΔTeC/Δσ (eC temperature change under unit stress change) for [MDABCO](NH4)I3 are −60.0 J K−1 kg−1 GPa−1 and 17.9 K GPa−1, respectively, which are 20 times higher than the traditional ferroelectric oxides such as BaTiO3 thin films. We have also demonstrated that the eC performance can be improved by reducing the Young’s modulus or enhancing the thermal expansion coefficient (which could be realized through chemical doping, etc.). We expect these discoveries to spur further interest in the potential applications of metal-free organic ferroelectrics materials towards next-generation eC refrigeration devices.

Polyelectrolyte–single wall carbon nanotube composite as an effective cathode catalyst for air-cathode microbial fuel cells

2014 ◽  
Vol 70 (10) ◽  
pp. 1610-1616 ◽  
Author(s):  
Huanan Wu ◽  
Min Lu ◽  
Lin Guo ◽  
Leonard Guan Hong Bay ◽  
Zheng Zhang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Carbon Nanotube ◽  
Oxygen Reduction ◽  
Microbial Fuel Cells ◽  
Reduction Process ◽  
Air Cathode ◽  
Single Wall Carbon Nanotube ◽  
Single Wall Carbon ◽  
Cathode Catalysts ◽  
Metal Free

Polyelectrolyte–single wall carbon nanotube (SCNT) composites are prepared by a solution-based method and used as metal-free cathode catalysts for oxygen reduction reaction (ORR) in air-cathode microbial fuel cells (MFCs). In this study, two types of polyelectrolytes, polydiallyldimethylammonium chloride (PDDA) and poly[bis(2-chloroethyl)ether-alt-1,3-bis[3-(dimethylamino)propyl]urea] (PEPU) are applied to decorate the SCNTs and the resulting catalysts exhibit remarkable catalytic ability toward ORR in MFC applications. The enhanced catalytic ability could be attributed to the positively charged quaternary ammonium sites of polyelectrolytes, which increase the oxygen affinity of SCNTs and reduce activation energy in the oxygen reduction process. It is also found that PEPU–SCNT composite-based MFCs show efficient performance with maximum power density of 270.1 mW m−2, comparable to MFCs with the benchmark Pt/C catalyst (375.3 mW m−2), while PDDA–SCNT composite-based MFCs produce 188.9 mW m−2. These results indicate that PEPU–SCNT and PDDA–SCNT catalysts are promising candidates as metal-free cathode catalysts for ORR in MFCs and could facilitate MFC scaling up and commercialization.

Hierarchical catalytic electrodes of cobalt-embedded carbon nanotube/carbon flakes arrays for flexible solid-state zinc-air batteries

Carbon ◽  
2019 ◽  
Vol 142 ◽  
pp. 379-387 ◽  
Author(s):  
Dongxiao Ji ◽  
Li Fan ◽  
Linlin Li ◽  
Ning Mao ◽  
Xiaohong Qin ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Solid State ◽  
Zinc Air Batteries

Nitrogen-doped micropore-dominant carbon derived from waste pine cone as a promising metal-free electrocatalyst for aqueous zinc/air batteries

2017 ◽  
Vol 365 ◽  
pp. 76-82 ◽  
Author(s):  
Xiaoke Lei ◽  
Mengran Wang ◽  
Yanqing Lai ◽  
Langtao Hu ◽  
Hao Wang ◽  
...  
Keyword(s):  
Nitrogen Doped ◽  
Metal Free ◽  
Pine Cone ◽  
Zinc Air Batteries

scholarly journals CoSb3 alloy nanoparticles wrapped with N-doped carbon layers as a highly active bifunctional electrocatalyst for zinc–air batteries

RSC Advances ◽  
2017 ◽  
Vol 7 (52) ◽  
pp. 33012-33019 ◽  
Author(s):  
Tian-bo Yang ◽  
Kai-Yuan Zhou ◽  
Guang-Yi Chen ◽  
Wan-Xi Zhang ◽  
Ji-Cai Liang
Keyword(s):  
Electrochemical Properties ◽  
Alloy Nanoparticles ◽  
Air Cathode ◽  
Bifunctional Electrocatalyst ◽  
Catalytic Activities ◽  
Highly Active ◽  
Air Battery ◽  
Zinc Air Batteries

CoSb3 nanoparticles wrapped with N-doped carbon layers have been prepared and showed excellent catalytic activities both for ORR and OER. A real rechargeable zinc–air battery with CoSb3@NCL-30 catalyst as air cathode exhibited outstanding electrochemical properties.

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