High strength hydrogels enable dendrite-free Zn metal anodes and high-capacity Zn-MnO2 batteries via a modified mechanical suppression effect

2022 ◽  
Author(s):  
Ruijie Zhu ◽  
Huijun Yang ◽  
Wei Cui ◽  
Laras Fadillah ◽  
Tianhong Huang ◽  
...  
Keyword(s):  
Low Cost ◽  
High Capacity ◽  
High Strength ◽  
High Energy ◽  
Zinc Ion ◽  
High Energy Density ◽  
Suppression Effect ◽  
Current Topic ◽  
A Current ◽  
Intrinsic Safety

Rechargeable aqueous zinc-ion batteries (RAZIBs) have some inherent advantages such as intrinsic safety, low-cost and theoretically high energy density, making them a current topic of interest. However, the phenomenon of...

A High-Performance Free-Standing Zn Anode for Flexible Zinc-Ion Batteries

Nanoscale ◽  
2021 ◽  
Author(s):  
Chenxi Gao ◽  
Jiawei Wang ◽  
Yuan Huang ◽  
Zixuan Li ◽  
Jiyan Zhang ◽  
...  
Keyword(s):  
Energy Density ◽  
High Performance ◽  
Low Cost ◽  
High Energy ◽  
Zinc Ion ◽  
High Energy Density ◽  
Free Standing ◽  
Energy Device ◽  
Zn Anode ◽  
Significant Attention

Zinc-ion batteries (ZIBs) have attracted significant attention owing to their high safety, high energy density, and low cost. ZIBs have been studied as a potential energy device for portable and...

scholarly journals Ultrathin δ-MnO2 nanoflakes with Na+ intercalation as a high-capacity cathode for aqueous zinc-ion batteries

RSC Advances ◽  
2020 ◽  
Vol 10 (30) ◽  
pp. 17702-17712 ◽  
Author(s):  
Haijun Peng ◽  
Huiqing Fan ◽  
Chenhui Yang ◽  
Yapeng Tian ◽  
Chao Wang ◽  
...  
Keyword(s):  
Energy Density ◽  
High Capacity ◽  
High Energy ◽  
Zinc Ion ◽  
Sodium Ion ◽  
High Energy Density

Sodium-ion intercalated δ-MnO2 nanoflakes are applied in an aqueous rechargeable zinc battery cathode with high energy density and excellent durable stability.

Defective MnO2 nanosheets based free-standing and high mass loading electrodes for high energy density aqueous zinc ion batteries

2021 ◽  
Author(s):  
Ping Shang ◽  
Yuanhao Liu ◽  
Yingying Mei ◽  
Lisha Wu ◽  
Yanfeng Dong
Keyword(s):  
Large Scale ◽  
Low Cost ◽  
High Energy ◽  
Zinc Ion ◽  
Wearable Devices ◽  
High Energy Density ◽  
High Mass ◽  
Mass Loading ◽  
Free Standing ◽  
Mno2 Nanosheets

Aqueous zinc ion batteries (ZIBs) hold great promises for large-scale energy storage and wearable devices due to their low cost and high safety, but suffer from low capacity and energy...

Achieving Both High Voltage and High Capacity in Aqueous Zinc‐Ion Battery for Record High Energy Density

2019 ◽  
Vol 29 (46) ◽  
pp. 1906142 ◽  
Author(s):  
Longtao Ma ◽  
Na Li ◽  
Changbai Long ◽  
Binbin Dong ◽  
Daliang Fang ◽  
...  
Keyword(s):  
Energy Density ◽  
High Voltage ◽  
High Capacity ◽  
High Energy ◽  
Zinc Ion ◽  
High Energy Density

Three-dimensional networked Na3V2(PO4)3/C composite as high-performance cathode for aqueous zinc-ion battery

2021 ◽  
Vol 14 (02) ◽  
pp. 2150011
Author(s):  
Xiaoyong Fan ◽  
Ruibo Sun ◽  
Jiaxing Han ◽  
Yan Wu ◽  
Lei Gou ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
High Performance ◽  
Three Dimensional ◽  
High Capacity ◽  
High Energy ◽  
Zinc Ion ◽  
High Rate ◽  
High Energy Density ◽  
Soft Template ◽  
Ammonium Bromide

Na3V2(PO[Formula: see text] (NVP) as one typical Na[Formula: see text] super ionic conductor (NASICON) is recognized as an ideal cathode material for ZIBs owing to its promising structural stability that facilitates long cycle, rich vacancies and channels facilitate storing metal ions, high operating potentials to ensure high energy density. However, it still faces poor cyclability and high-rate capacity. Here, three-dimensional networked Na3V2(PO[Formula: see text]/C composite is synthesized by a microemulsion strategy with cetyltrimethyl ammonium bromide (CTAB) as the soft template, and the effect of aging temperature of microemulsion on their morphology and electrochemical performance is investigated. The Na3V2(PO[Formula: see text]/C composite derived from the precursor reacted at 70[Formula: see text]C shows micrometer-size particles assembled by three-dimensional networked nanoplates, facilitating for ions transport and delivers the best electrochemical performance. It displays a high first capacity of 102.2 mAh g[Formula: see text] with 42.3 mAh g[Formula: see text] remained after 5000 stable cycles (capacity retention of 41.4%) at 5 C, a high capacity of 83.2 mAh g[Formula: see text] even the current density is as high as 20 C, which is better than most of the reports.

MXene Nanoflakes Confined in Multichannel Carbon Nanofibers as Electrocatalysts for Lithium–Sulfur Batteries

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Yaxi Tian ◽  
Huawen Huang ◽  
Chen Chen ◽  
Yuanfu Deng ◽  
Lei Zhang
Keyword(s):  
Carbon Nanofibers ◽  
Active Sites ◽  
Low Cost ◽  
High Capacity ◽  
Hollow Structure ◽  
High Energy ◽  
High Energy Density ◽  
Shuttle Effect ◽  
Sulfur Hosts ◽  
Lithium Sulfur

Abstract Lithium–sulfur (Li–S) batteries have been research hotspots because of their significant advantages in high-energy density and low cost. However, the notorious shuttle effect results in poor electrochemical performance, which is a serious obstacle for their practical application. The delicate design of sulfur hosts is a very important strategy to suppress the shuttle effect. Herein, MXene nanoflakes confined within multichannel carbon nanofibers (MXene@MCNF) have been successfully synthesized as robust electrocatalysts for Li–S batteries based on a simple electrospun method followed by a carbonization process. This unique structure effectively prevents the restacking of MXene nanoflakes, which is conducive to improve the electrocatalytic activity of MXene for propelling the redox reaction of polysulfides owing to the abundant exposure of surface active sites. Moreover, the multichannel hollow structure can inhibit the outward dissolution of polysulfides via the physical confinement caused by their abundant pore structures and alleviate the huge volume change of sulfur cathode. Benefiting from these aforementioned advantages, MXene@MCNF-sulfur (MXene@MCNF-S) cathode delivers a high capacity of 1177 mA h/g at 0.2 C and excellent cycling stability after 200 cycles at 2.0 C.

scholarly journals Na0.76V6O15/Activated Carbon Hybrid Cathode for High-Performance Lithium-Ion Capacitors

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 122
Author(s):  
Renwei Lu ◽  
Xiaolong Ren ◽  
Chong Wang ◽  
Changzhen Zhan ◽  
Ding Nan ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
Power Density ◽  
Cathode Materials ◽  
Low Cost ◽  
Lithium Ion ◽  
High Energy ◽  
Cycling Stability ◽  
High Energy Density ◽  
Artificial Graphite

Lithium-ion hybrid capacitors (LICs) are regarded as one of the most promising next generation energy storage devices. Commercial activated carbon materials with low cost and excellent cycling stability are widely used as cathode materials for LICs, however, their low energy density remains a significant challenge for the practical applications of LICs. Herein, Na0.76V6O15 nanobelts (NaVO) were prepared and combined with commercial activated carbon YP50D to form hybrid cathode materials. Credit to the synergism of its capacitive effect and diffusion-controlled faradaic effect, NaVO/C hybrid cathode displays both superior cyclability and enhanced capacity. LICs were assembled with the as-prepared NaVO/C hybrid cathode and artificial graphite anode which was pre-lithiated. Furthermore, 10-NaVO/C//AG LIC delivers a high energy density of 118.9 Wh kg−1 at a power density of 220.6 W kg−1 and retains 43.7 Wh kg−1 even at a high power density of 21,793.0 W kg−1. The LIC can also maintain long-term cycling stability with capacitance retention of approximately 70% after 5000 cycles at 1 A g−1. Accordingly, hybrid cathodes composed of commercial activated carbon and a small amount of high energy battery-type materials are expected to be a candidate for low-cost advanced LICs with both high energy density and power density.

Polyacrylonitrile derived porous carbon for zinc ion hybrid capacitors with high energy density

2021 ◽  
Author(s):  
Xiaowen Fan ◽  
Penggao Liu ◽  
Baixue Ouyang ◽  
Ruizheng Cai ◽  
Xinxin Chen ◽  
...  
Keyword(s):  
Energy Density ◽  
Porous Carbon ◽  
High Energy ◽  
Zinc Ion ◽  
High Energy Density ◽  
Hybrid Capacitors
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