scholarly journals Cycling Performance of NMC811 Anode-Free Pouch Cells with 65 Different Electrolyte Formulations

2021 ◽  
Author(s):  
Ahmed Eldesoky ◽  
Alex Louli ◽  
Annika Benson ◽  
Jeff R Dahn
Keyword(s):  
Cost Effective ◽  
Cycling Performance ◽  
High Energy ◽  
High Energy Density ◽  
Data Set ◽  
Liquid Electrolytes ◽  
Discharge Rates ◽  
Cu Foil ◽  
Marginal Improvement ◽  
Effective Path

Abstract Liquid electrolytes for anode-free Li metal batteries (LMBs) provide a cost-effective path to high energy density. However, liquid electrolytes are challenging due to the reactivity of Li0 with the electrolyte and the resulting Li loss, as well as mossy Li deposits leading to inactive Li and dendrite formation. Thus, more research is needed to develop electrolytes capable of 80% capacity retention after 800 cycles to meet electric vehicle (EV) demands. Here, we report cycle life results from 65 electrolyte mixtures consisting of various additives or co-solvents added to a dual-salt base electrolyte previously reported by our group. We tested these electrolyte systems using a practical anode-free pouch cell design with a high-loading (16 mg cm-2, or 3.47 mAh cm 2) LiNi0.8Mn0.1Co0.1O2 (NMC811) cathode, with a bare Cu foil as the counter electrode. All cells in this work were cycled at 40 °C with 0.2C/0.5C charge/discharge rates between 3.55 4.40 V. Based on the total energy delivered over 140 cycles, only five electrolytes showed marginal improvement over the baseline, while the other electrolytes were uncompetitive. This data set can serve as a guide for LMB researchers investigating electrolyte systems and highlights the challenges associated with liquid electrolytes.

Potassium Pre-Inserted K1.04Mn8O16 Cathode Materials for Aqueous Li-Ion and Na-Ion Hybrid Capacitors

2019 ◽  
Author(s):  
Yamin Zhang ◽  
Lina Chen ◽  
Chongyang Hao ◽  
Xiaowen Zheng ◽  
Yixuan Guo ◽  
...  
Keyword(s):  
Cycling Performance ◽  
High Energy ◽  
High Energy Density ◽  
Potassium Ions ◽  
Tunnel Structure ◽  
Hybrid Supercapacitor ◽  
Hybrid Supercapacitors ◽  
Li Ion ◽  
Power Densities ◽  
Hybrid Capacitors

For the applications of aqueous Li-ion hybrid capacitors and Na-ion hybrid capacitors, potassium ions are pre-inserted into MnO<sub>2</sub> tunnel structure, the as-prepared K<sub>1.04</sub>Mn<sub>8</sub>O<sub>16</sub> materials consist of <a>nanoparticles</a> and nanorods were prepared by facile high-temperature solid-state reaction. <a></a>The as-prepared materials were well studied andthey show outstanding electrochemical behavior. We assembled hybrid supercapacitors with commercial activated carbon (YEC-8A) as anode and K<sub>1.04</sub>Mn<sub>8</sub>O<sub>16 </sub>as cathode. It has high energy densities and power densities. Li-ion capacitors reach a high energy density of 127.61 Wh kg<sup>-1 </sup>at the power density of 99.86 W kg<sup>-1</sup> and Na-ion capacitor obtains 170.96 Wh kg<sup>-1 </sup>at 133.79 W kg<sup>-1</sup>. In addition, the <a>hybrid supercapacitor</a>s demonstrate excellent cycling performance which maintain 97 % capacitance retention for Li-ion capacitor and 85 % for Na-ion capacitor after 10,000 cycles.

scholarly journals Research Progress and Key Issues of Hydrodebenzylation of Hexabenzylhexaazaisowurtzitane (HBIW) in the Synthesis of High Energy Density Material Hexanitrohexaazaisowurtzitane (HNIW)

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 409
Author(s):  
Xiaofei Tang ◽  
Rui Zhu ◽  
Tianjing Shi ◽  
Yu Wang ◽  
Xiaochen Niu ◽  
...  
Keyword(s):  
Energy Density ◽  
High Performance ◽  
Research Effort ◽  
Specific Impulse ◽  
Cost Effective ◽  
High Energy ◽  
High Energy Density ◽  
Research Progress ◽  
Fourth Generation ◽  
Key Issues

High energy density materials (HEDM) are the subject of an extensive research effort in relation to the use of these compounds as components of rocket propellants, powders, and formulations of high-performance explosives. Hexanitrohexaazaisowurtzitane (HNIW, i.e., CL-20) has received much attention in these research fields for its specific impulse, burning rate, ballistics, and detonation velocity. In this paper, the development and performances of the explosives from the first to the fourth generation are briefly summarized, and the synthesis status of the fourth-generation explosive, HNIW, is reviewed. The key issues that restrict the development of industrial amplification synthesis of HNIW are analyzed, and the potential directions of development are proposed. It is pointed out that to synthesize new and efficient catalysts is the key to making the cost-effective manufacturing of CL-20 a reality.

Facile Synthesis of Uniform Carbon Coated Li2S/rGO cathode for High-Performance Lithium-Sulfur Batteries

MRS Advances ◽  
2018 ◽  
Vol 3 (60) ◽  
pp. 3501-3506 ◽  
Author(s):  
Gaind P. Pandey ◽  
Joshua Adkins ◽  
Lamartine Meda
Keyword(s):  
High Performance ◽  
Active Material ◽  
Cycling Performance ◽  
High Energy ◽  
High Energy Density ◽  
Shell Nanostructures ◽  
Lithium Sulfur Batteries ◽  
Carbon Coated ◽  
Co Precipitation ◽  
Lithium Sulfur

ABSTRACTLithium sulfide (Li2S) is one of the most attractive cathode materials for high energy density lithium batteries as it has a high theoretical capacity of 1166 mA h g-1. However, Li2S suffers from poor rate performance and short cycle life due to its insulating nature and polysulfide shuttle during cycling. In this work, we report a facile and viable approach to address these issues. We propose a method to synthesize a Li2S based nanocomposite cathode material by dissolving Li2S as the active material, polyvinylpyrrolidone (PVP) as the carbon precursor, and graphene oxide (GO) as a matrix to enhance the conductivity, followed by a co-precipitation and high-temperature carbonization process. The Li2S/rGO cathode yields an exceptionally high initial capacity of 817 mAh g-1 based on Li2S mass at C/20 rate and also shows a good cycling performance. The carbon-coated Li2S/rGO cathode demonstrates the capability of robust core-shell nanostructures for different rates and improved capacity retention, revealing carbon coated Li2S/rGO composites as an outstanding system for high-performance lithium-sulfur batteries.

scholarly journals Rationally engineered 3D-dendritic cell-like morphologies of LDH nanostructures using graphene-based core–shell structures

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Karthik Kiran Sarigamala ◽  
Shobha Shukla ◽  
Alexander Struck ◽  
Sumit Saxena
Keyword(s):  
Effective Properties ◽  
Specific Capacity ◽  
Cost Effective ◽  
High Energy ◽  
Dendritic Morphology ◽  
High Energy Density ◽  
Pristine Graphene ◽  
Reduced Graphene ◽  
Fast Charging ◽  
Double Hydroxide

AbstractFunctionalization of graphene-based materials using chemical moieties not only modify the electronic structure of the underlying graphene but also enable in limited enhancement of targeted properties. Surface modification of graphene-based materials using other nanostructures enhances the effective properties by minimally modifying the properties of pristine graphene backbone. In this pursuit, we have synthesized bio-inspired hierarchical nanostructures based on Ni–Co layered double hydroxide on reduced graphene oxide core–shells using template based wet chemical approach. The material synthesized have been characterized structurally and electrochemically. The fabricated dendritic morphology of the composite delivers a high specific capacity of 1056 Cg−1. A cost effective solid state hybrid supercapacitor device was also fabricated using the synthesized electrode material which shows excellent performance with high energy density and fast charging capability.

Ionic liquid electrolytes supporting high energy density in sodium-ion batteries based on sodium vanadium phosphate composites

2018 ◽  
Vol 54 (28) ◽  
pp. 3500-3503 ◽  
Author(s):  
C. V. Manohar ◽  
Tiago Correia Mendes ◽  
Mega Kar ◽  
Dabin wang ◽  
Changlong Xiao ◽  
...  
Keyword(s):  
Energy Storage ◽  
Large Scale ◽  
Cost Effective ◽  
High Energy ◽  
Sodium Ion ◽  
High Energy Density ◽  
Sodium Ion Batteries ◽  
Vanadium Phosphate ◽  
Energy Storage Devices ◽  
Storage Devices

Sodium ion batteries (SIBs) are widely considered as alternative, sustainable, and cost-effective energy storage devices for large-scale energy storage applications.

scholarly journals Electrode Materials for Supercapacitors: A Review of Recent Advances

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 969
Author(s):  
Parnia Forouzandeh ◽  
Vignesh Kumaravel ◽  
Suresh C. Pillai
Keyword(s):  
Electrochemical Properties ◽  
Specific Capacitance ◽  
Electrode Materials ◽  
Electronic Device ◽  
High Energy ◽  
High Energy Density ◽  
Storage Mechanism ◽  
Hybrid Supercapacitors ◽  
Discharge Rates ◽  
Redox Active

The advanced electrochemical properties, such as high energy density, fast charge–discharge rates, excellent cyclic stability, and specific capacitance, make supercapacitor a fascinating electronic device. During recent decades, a significant amount of research has been dedicated to enhancing the electrochemical performance of the supercapacitors through the development of novel electrode materials. In addition to highlighting the charge storage mechanism of the three main categories of supercapacitors, including the electric double-layer capacitors (EDLCs), pseudocapacitors, and the hybrid supercapacitors, this review describes the insights of the recent electrode materials (including, carbon-based materials, metal oxide/hydroxide-based materials, and conducting polymer-based materials, 2D materials). The nanocomposites offer larger SSA, shorter ion/electron diffusion paths, thus improving the specific capacitance of supercapacitors (SCs). Besides, the incorporation of the redox-active small molecules and bio-derived functional groups displayed a significant effect on the electrochemical properties of electrode materials. These advanced properties provide a vast range of potential for the electrode materials to be utilized in different applications such as in wearable/portable/electronic devices such as all-solid-state supercapacitors, transparent/flexible supercapacitors, and asymmetric hybrid supercapacitors.

scholarly journals Enhanced cycling performance and high energy density of LiFePO4 based lithium ion batteries

2007 ◽  
Vol 61 (25) ◽  
pp. 4700-4702 ◽  
Author(s):  
Yi-Jie Gu ◽  
Cui-Song Zeng ◽  
Hui-Kang Wu ◽  
Hong-Zhi Cui ◽  
Xiao-Wen Huang ◽  
...  
Keyword(s):  
Energy Density ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Cycling Performance ◽  
High Energy ◽  
High Energy Density

scholarly journals Improved cycling stability of LiCoO2 at 4.5 V via surface modification of cathode plates with conductive LLTO

2020 ◽  
Author(s):  
Shipai Song ◽  
Xiang Peng ◽  
Kai Huang ◽  
Hao Zhang ◽  
Fang Wu ◽  
...  
Keyword(s):  
Lithium Ion ◽  
Reversible Capacity ◽  
Cycling Performance ◽  
High Energy ◽  
High Energy Density ◽  
Coating Materials ◽  
Stability Issue ◽  
Rate Capacity ◽  
The Stability ◽  
Stability Issues

Abstract The stability issue of LiCoO 2 cycled at high voltages is one of the burning questions for the development of lithium ion batteries with high energy density and long cycling life. Although it is effective to improve the cycling performance of LiCoO 2 via coating individual LiCoO 2 particles with another metal oxides or fluorides, the rate capacity is generally compromised because the typical coating materials are poor conductors. Herein, amorphous Li 0.33 La 0.56 TiO 3 , one of the most successful solid electrolytes, was directly deposited on the surface of made-up LiCoO 2 cathode plates through magnetron sputtering. Not only the inherent conductive network in the made-up LiCoO 2 cathode plates was retained, but also the Li + transport in bulk and across the cathode-electrolyte interface was enhanced. In addition, the surface chemical analysis of the cycled LiCoO 2 cathode plates suggests that most of the stability issues can be addressed via the deposition of amorphous Li 0.33 La 0.56 TiO 3 . With an optimized deposition time, the LiCoO 2 cathode plates modified by Li 0.33 La 0.56 TiO 3 performed a steady reversible capacity of 150 mAh/g at 0.2 C with the cut-off voltage from 2.75 to 4.5 V vs. Li + /Li, and an 84.6% capacity gain at 5 C comparing with the pristine one.

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