scholarly journals Defect-free potassium manganese hexacyanoferrate cathode material for high-performance potassium-ion batteries

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Leqing Deng ◽  
Jiale Qu ◽  
Xiaogang Niu ◽  
Juzhe Liu ◽  
Juan Zhang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Specific Energy ◽  
High Performance ◽  
Rate Capability ◽  
High Energy ◽  
Potassium Ion ◽  
High Energy Density ◽  
Electrochemical Energy Storage ◽  
Metal Anode ◽  
Electrochemical Energy

AbstractPotassium-ion batteries (KIBs) are promising electrochemical energy storage systems because of their low cost and high energy density. However, practical exploitation of KIBs is hampered by the lack of high-performance cathode materials. Here we report a potassium manganese hexacyanoferrate (K2Mn[Fe(CN)6]) material, with a negligible content of defects and water, for efficient high-voltage K-ion storage. When tested in combination with a K metal anode, the K2Mn[Fe(CN)6]-based electrode enables a cell specific energy of 609.7 Wh kg−1 and 80% capacity retention after 7800 cycles. Moreover, a K-ion full-cell consisting of graphite and K2Mn[Fe(CN)6] as anode and cathode active materials, respectively, demonstrates a specific energy of 331.5 Wh kg−1, remarkable rate capability, and negligible capacity decay for 300 cycles. The remarkable electrochemical energy storage performances of the K2Mn[Fe(CN)6] material are attributed to its stable frameworks that benefit from the defect-free structure.

scholarly journals Enhanced Potassium-Ion Storage of the 3D Carbon Superstructure by Manipulating the Nitrogen-Doped Species and Morphology

2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Yanhua Li ◽  
Kui Xiao ◽  
Cong Huang ◽  
Jin Wang ◽  
Ming Gao ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Performance ◽  
Density Functional ◽  
Large Scale ◽  
Specific Capacity ◽  
Rate Capability ◽  
High Energy ◽  
Potassium Ion ◽  
High Energy Density ◽  
Superior Performance

Abstract Potassium-ion batteries (PIBs) are attractive for grid-scale energy storage due to the abundant potassium resource and high energy density. The key to achieving high-performance and large-scale energy storage technology lies in seeking eco-efficient synthetic processes to the design of suitable anode materials. Herein, a spherical sponge-like carbon superstructure (NCS) assembled by 2D nanosheets is rationally and efficiently designed for K+ storage. The optimized NCS electrode exhibits an outstanding rate capability, high reversible specific capacity (250 mAh g−1 at 200 mA g−1 after 300 cycles), and promising cycling performance (205 mAh g−1 at 1000 mA g−1 after 2000 cycles). The superior performance can be attributed to the unique robust spherical structure and 3D electrical transfer network together with nitrogen-rich nanosheets. Moreover, the regulation of the nitrogen doping types and morphology of NCS-5 is also discussed in detail based on the experiments results and density functional theory calculations. This strategy for manipulating the structure and properties of 3D materials is expected to meet the grand challenges for advanced carbon materials as high-performance PIB anodes in practical applications.

scholarly journals Asymmetric faradaic assembly of Bi2O3 and MnO2 for a high-performance hybrid electrochemical energy storage device

RSC Advances ◽  
2019 ◽  
Vol 9 (55) ◽  
pp. 32154-32164 ◽  
Author(s):  
Saurabh Singh ◽  
Rakesh K. Sahoo ◽  
Nanasaheb M. Shinde ◽  
Je Moon Yun ◽  
Rajaram S. Mane ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Electrochemical Performance ◽  
High Performance ◽  
High Energy ◽  
High Energy Density ◽  
Electrochemical Energy Storage ◽  
Storage Device ◽  
Energy Storage Device ◽  
Electrochemical Energy

A hybrid electrochemical energy storage device assembled with faradaic Bi2O3 and MnO2 electrodes exhibits superior electrochemical performance with a high energy density of 79 W h kg−1 at a power density of 702 W kg−1.

scholarly journals Bio-inspired low-tortuosity carbon host for high-performance lithium-metal anode

2018 ◽  
Vol 6 (2) ◽  
pp. 247-256 ◽  
Author(s):  
Yi-Chen Yin ◽  
Zhi-Long Yu ◽  
Zhi-Yuan Ma ◽  
Tian-Wen Zhang ◽  
Yu-Yang Lu ◽  
...  
Keyword(s):  
Volume Change ◽  
High Performance ◽  
Rate Capability ◽  
High Energy ◽  
High Energy Density ◽  
Lithium Metal ◽  
Metal Anode ◽  
Lithium Metal Anode ◽  
Nucleation Sites ◽  
Micro Channels

Abstract Lithium metal is one of the most promising anode materials for high-energy-density Li batteries. However, low stability caused by dendrite growth and volume change during cycling hinders its practical application. Herein, we report an ingenious design of bio-inspired low-tortuosity carbon with tunable vertical micro-channels to be used as a host to incorporate nanosized Sn/Ni alloy nucleation sites, which can guide Li metal's plating/stripping and meanwhile accommodate the volume change. The pore sizes of the vertical channels of the carbon host can be regulated to investigate the structure–performance correlation. After compositing Li, the bio-inspired carbon host with the smallest pore size (∼14 μm) of vertical channels exhibits the lowest overpotential (∼18 mV at 1 mA cm−2), most stable tripping/plating voltage profiles, and best cycling stability (up to 500 cycles) in symmetrical cells. Notably, the carbon/Li composite anode is more rewarding than Li foil when coupled with LiFePO4 in full cells, exhibiting a much lower polarization effect, better rate capability and higher capacity retention (90.6% after 120 cycles). This novel bio-inspired design of a low-tortuosity carbon host with nanoalloy coatings may open a new avenue for fabricating advanced Li-metal batteries with high performance.

scholarly journals Categorization of electrochemical storage materials en route to new concepts

2014 ◽  
Vol 70 (a1) ◽  
pp. C364-C364
Author(s):  
Falk Meutzner ◽  
Tina Nestler ◽  
Juliane Hanzig ◽  
Matthias Zschornak ◽  
Mateo Ureña de Vivanco ◽  
...  
Keyword(s):  
Energy Storage ◽  
Materials Science ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
Electrochemical Energy Storage ◽  
Ministry Of Education ◽  
Energy Storage Devices ◽  
New Concepts ◽  
Electrochemical Energy

Because of their broad range of applications, electrochemical energy storage devices are the subject of a growing field of science and technology. Their unique features of high practical energy and power densities and low prices allow mobile and stationary applications. A large variety of electrochemical systems has been tailored for specific applications: Lithium-ion batteries for example have been optimized for mobile applications ranging from mobile phones to electric vehicles. On the other hand, sodium-sulphur accumulators – among others – have been developed for stationary applications to account for the capricious nature of renewable energies. Chemistry, physics and materials science have led to the optimization of existing cell-chemistries and the development of new concepts such as all-liquid or all-solid state batteries as well as high-energy density metal-air batteries. The aim of the BMBF (Federal Ministry of Education and Research, Germany)-financed project "CryPhysConcept" is to develop new concepts for electrochemical energy storage applying a crystallographic approach. First, a categorization of the main solid components of batteries based on their underlying working principles is suggested. Second, an algorithm for the identification of suitable new materials and material combinations, based on economical, ecological and material properties as well as crystallographic parameters, is presented. Based on these results, new concepts using multi-valent metal ions are proposed. Theoretical as well as experimental results including an iron-ion approach are presented.

scholarly journals Vanadium pentoxide/carbide-derived carbon core–shell hybrid particles for high performance electrochemical energy storage

2016 ◽  
Vol 4 (48) ◽  
pp. 18899-18909 ◽  
Author(s):  
Marco Zeiger ◽  
Teguh Ariyanto ◽  
Benjamin Krüner ◽  
Nicolas J. Peter ◽  
Simon Fleischmann ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Performance ◽  
Vanadium Carbide ◽  
High Energy ◽  
Electrochemical Energy Storage ◽  
Core Shell ◽  
Hybrid Particles ◽  
Carbon Core ◽  
Carbide Derived Carbon ◽  
Electrochemical Energy

V2O5/carbide-derived carbon core–shell hybrid electrodes can be synthesized using vanadium carbide as the precursor. The resulting hybrid material shows high energy and power ratings for electrochemical energy storage.

A novel metal–organic framework derived carbon nanoflower with effective electromagnetic microwave absorption and high-performance electrochemical energy storage properties

2021 ◽  
Author(s):  
Liwei Zhu ◽  
Ning Liu ◽  
Xincheng Lv ◽  
Ziqiu Zhang ◽  
Liangmin Yu ◽  
...  
Keyword(s):  
Energy Storage ◽  
Microwave Absorption ◽  
High Performance ◽  
Metal Organic Framework ◽  
Electrochemical Energy Storage ◽  
Carbon Nanomaterial ◽  
Energy Storage Properties ◽  
Metal Organic ◽  
Storage Properties ◽  
Electrochemical Energy

A novel carbon nanomaterial with unique morphology was prepared and proven to be an effective material for EMWA and electrochemical energy storage.

Ozone-Based Atomic Layer Deposition of Crystalline V2O5 Films for High Performance Electrochemical Energy Storage

2012 ◽  
Vol 24 (7) ◽  
pp. 1255-1261 ◽  
Author(s):  
Xinyi Chen ◽  
Ekaterina Pomerantseva ◽  
Parag Banerjee ◽  
Keith Gregorczyk ◽  
Reza Ghodssi ◽  
...  
Keyword(s):  
Energy Storage ◽  
Atomic Layer Deposition ◽  
High Performance ◽  
Atomic Layer ◽  
Electrochemical Energy Storage ◽  
Layer Deposition ◽  
Electrochemical Energy

Hierarchical coral-like MnCo2O4.5@Co-Ni LDH composites on Ni foam as promising electrodes for high-performance supercapacitor

2021 ◽  
Author(s):  
yajun JI ◽  
Fei Chen ◽  
Shufen Tan ◽  
Fuyong Ren
Keyword(s):  
Electrochemical Performance ◽  
Metal Oxides ◽  
High Performance ◽  
High Capacity ◽  
Rate Capability ◽  
Negative Electrode ◽  
High Energy ◽  
Hybrid Nanostructures ◽  
High Energy Density ◽  
Ni Foam

Abstract Transition metal oxides are generally designed as hybrid nanostructures with high performance for supercapacitors by enjoying the advantages of various electroactive materials. In this paper, a convenient and efficient route had been proposed to prepare hierarchical coral-like MnCo2O4.5@Co-Ni LDH composites on Ni foam, in which MnCo2O4.5 nanowires were enlaced with ultrathin Co-Ni layered double hydroxides nanosheets to achieve high capacity electrodes for supercapacitors. Due to the synergistic effect of shell Co-Ni LDH and core MnCo2O4.5, the outstanding electrochemical performance in three-electrode configuration was triggered (high area capacitance of 5.08 F/cm2 at 3 mA/cm2 and excellent rate capability of maintaining 61.69 % at 20 mA/cm2), which is superior to those of MnCo2O4.5, Co-Ni LDH and other metal oxides based composites reported. Meanwhile, the as-prepared hierarchical MnCo2O4.5@Co-Ni LDH electrode delivered improved electrical conductivity than that of pristine MnCo2O4.5. Furthermore, the as-constructed asymmetric supercapacitor using MnCo2O4.5@Co-Ni LDH as positive and activated carbon as negative electrode presented a rather high energy density of 220 μWh/cm2 at 2400 μW/cm2 and extraordinary cycling durability with the 100.0 % capacitance retention over 8000 cycles at 20 mA/cm2, demonstrating the best electrochemical performance compared to other asymmetric supercapacitors using metal oxides based composites as positive electrode material. It can be expected that the obtained MnCo2O4.5@Co-Ni LDH could be used as the high performance and cost-effective electrode in supercapacitors.

Cobalt-Doped Nickel Phosphite for High Performance of Electrochemical Energy Storage

Small ◽  
2018 ◽  
Vol 14 (13) ◽  
pp. 1703811 ◽  
Author(s):  
Bing Li ◽  
Yuxin Shi ◽  
Kesheng Huang ◽  
Mingming Zhao ◽  
Jiaqing Qiu ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Performance ◽  
Electrochemical Energy Storage ◽  
Electrochemical Energy
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