Dataset Information

3D zinc@carbon fiber composite framework anode for aqueous Zn-MnO₂ batteries.

ABSTRACT: Rechargeable aqueous batteries are one of the most promising large-scale energy storage devices because of their environment-friendly properties and high safety advantages without using flammable and poisonous organic liquid electrolyte. In addition, rechargeable Zn-MnO₂ batteries have great potential due to their low-cost resources as well as high energy density. However, dendritic growth of the zinc anode hinders the exertion of cycling stability and rate capacity in an aqueous Zn-MnO₂ battery system. Here we use an electrochemical deposition method to in situ form a three-dimensional (3D) zinc anode on carbon fibers (CFs). This 3D Zn@CFs framework has lower charge transfer resistance with larger electroactive areas. Batteries based on the 3D zinc framework anode and α-MnO₂ nanowire cathode present enhanced rate capacity and long cycling stability, which is promising for utilization in other zinc anode based aqueous batteries as an effective way to solve dendrite formation.

SUBMITTER: Dong W

PROVIDER: S-EPMC9080616 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

3D zinc@carbon fiber composite framework anode for aqueous Zn-MnO<sub>2</sub> batteries.

Dong Wei W Shi Ji-Lei JL Wang Tai-Shan TS Yin Ya-Xia YX Wang Chun-Ru CR Guo Yu-Guo YG

RSC advances 20180524 34

Rechargeable aqueous batteries are one of the most promising large-scale energy storage devices because of their environment-friendly properties and high safety advantages without using flammable and poisonous organic liquid electrolyte. In addition, rechargeable Zn-MnO<sub>2</sub> batteries have great potential due to their low-cost resources as well as high energy density. However, dendritic growth of the zinc anode hinders the exertion of cycling stability and rate capacity in an aqueous Zn-M ...[more]

PMID: 35539665

Similar Datasets

Project description:Bagasse-derived carbon electrodes were developed by doping with nitrogen functional groups and compositing with high-capacity MnO2 nanoparticles (MnO2/NBGC). The bagasse-derived biochar was N-doped by refluxing in urea, followed by the deposition of MnO2 nanoparticles onto its porous surface via the hydrothermal reduction of KMnO4. Different initial KMnO4 loading concentrations (i.e. 5, 10, 40, and 100 mM) were applied to optimize the composite morphology and the corresponding electrochemical performance. Material characterization confirmed that the carbon composite has a mesoporous structure along with the dispersion of MnO2 nano-particles on the N-containing carbon surface. It was found that the 5-MnO2/NBGC sample exhibited the highest electrochemical performance with a reversible capacity of 760 mA h g-1 at a current density of 186 mA g-1. It delivered reversible capacities of 488 and 390 mA h g-1 in cycle tests at 372 and 744 mA g-1, respectively, for 150 cycles and presented good reversibility with nearly 100% coulombic efficiency. In addition, it could exert high capacities up to 388 and 301 mA h g-1 even under high current densities of 1860 and 3720 mA g-1, respectively. Moreover, most of the prepared composite products showed high rate capability with great reversibility up to more than 90% after testing at a high current density of 3720 mA g-1. The great electrochemical performance of the MnO2/NBGC nanocomposite electrode can be attributed to the synergistic impact of the hierarchical architecture of the MnO2 nanocrystals deposited on porous carbon and the capacitive effect of the N-containing defects within the carbon material. The nanostructure of the MnO2 particles deposited on porous carbon limits its large volume change during cycling and promotes good adhesion of MnO2 nanoparticles with the substrate. Meanwhile, the capacitive effect of the exposed N-functional groups enables fast ionic conduction and reduces interfacial resistance at the electrode interface.

Dataset Information

3D zinc@carbon fiber composite framework anode for aqueous Zn-MnO₂ batteries.

Publications

3D zinc@carbon fiber composite framework anode for aqueous Zn-MnO<sub>2</sub> batteries.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets

Dataset Information

3D zinc@carbon fiber composite framework anode for aqueous Zn-MnO2 batteries.

Publications

3D zinc@carbon fiber composite framework anode for aqueous Zn-MnO<sub>2</sub> batteries.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets

3D zinc@carbon fiber composite framework anode for aqueous Zn-MnO₂ batteries.