High Coulombic Efficiency Na–O2 Batteries Enabled by a Bilayer Ionogel/Ionic Liquid

2019 ◽  
Vol 10 (22) ◽  
pp. 7050-7055 ◽  
Author(s):  
The An Ha ◽  
Asier Fdz De Anastro ◽  
Nagore Ortiz-Vitoriano ◽  
Jian Fang ◽  
Douglas R. MacFarlane ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Coulombic Efficiency ◽  
High Coulombic Efficiency

scholarly journals High Coulombic efficiency aluminum-ion battery using an AlCl3-urea ionic liquid analog electrolyte

2017 ◽  
Vol 114 (5) ◽  
pp. 834-839 ◽  
Author(s):  
Michael Angell ◽  
Chun-Jern Pan ◽  
Youmin Rong ◽  
Chunze Yuan ◽  
Meng-Chang Lin ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Ionic Liquid ◽  
Energy Storage ◽  
Coulombic Efficiency ◽  
Intercalation Compound ◽  
Molar Ratio ◽  
Storage Device ◽  
In Situ Raman Spectroscopy ◽  
Charge Discharge ◽  
High Coulombic Efficiency

In recent years, impressive advances in harvesting renewable energy have led to a pressing demand for the complimentary energy storage technology. Here, a high Coulombic efficiency (∼99.7%) Al battery is developed using earth-abundant aluminum as the anode, graphite as the cathode, and a cheap ionic liquid analog electrolyte made from a mixture of AlCl3and urea in a 1.3:1 molar ratio. The battery displays discharge voltage plateaus around 1.9 and 1.5 V (average discharge = 1.73 V) and yielded a specific cathode capacity of ∼73 mAh g−1at a current density of 100 mA g−1(∼1.4 C). High Coulombic efficiency over a range of charge–discharge rates and stability over ∼150–200 cycles was easily demonstrated. In situ Raman spectroscopy clearly showed chloroaluminate anion intercalation/deintercalation of graphite (positive electrode) during charge–discharge and suggested the formation of a stage 2 graphite intercalation compound when fully charged. Raman spectroscopy and NMR suggested the existence of AlCl4−, Al2Cl7−anions and [AlCl2·(urea)n]+cations in the AlCl3/urea electrolyte when an excess of AlCl3was present. Aluminum deposition therefore proceeded through two pathways, one involving Al2Cl7−anions and the other involving [AlCl2·(urea)n]+cations. This battery is a promising prospect for a future high-performance, low-cost energy storage device.

Substituent Effect of Imidazolium Ionic Liquid: A Potential Strategy for High Coulombic Efficiency Al Battery

2019 ◽  
Vol 123 (18) ◽  
pp. 11522-11528 ◽  
Author(s):  
Congrong Yang ◽  
Suli Wang ◽  
Xiaoming Zhang ◽  
Qiang Zhang ◽  
Wenjia Ma ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Substituent Effect ◽  
Coulombic Efficiency ◽  
Imidazolium Ionic Liquid ◽  
Potential Strategy ◽  
High Coulombic Efficiency

Enhanced Ion Transport in an Ether Aided Super Concentrated Ionic Liquid Electrolyte for Long-Life Practical Lithium Metal Battery Applications

2020 ◽  
Author(s):  
Urbi Pal ◽  
Fangfang Chen ◽  
Derick Gyabang ◽  
Thushan Pathirana ◽  
Binayak Roy ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ion Transport ◽  
Current Density ◽  
Coulombic Efficiency ◽  
High Energy ◽  
Liquid Electrolyte ◽  
High Mass ◽  
Lithium Metal ◽  
Ionic Liquid Electrolyte ◽  
Lithium Metal Battery

We explore a novel ether aided superconcentrated ionic liquid electrolyte; a combination of ionic liquid, <i>N</i>-propyl-<i>N</i>-methylpyrrolidinium bis(fluorosulfonyl)imide (C<sub>3</sub>mpyrFSI) and ether solvent, <i>1,2</i> dimethoxy ethane (DME) with 3.2 mol/kg LiFSI salt, which offers an alternative ion-transport mechanism and improves the overall fluidity of the electrolyte. The molecular dynamics (MD) study reveals that the coordination environment of lithium in the ether aided ionic liquid system offers a coexistence of both the ether DME and FSI anion simultaneously and the absence of ‘free’, uncoordinated DME solvent. These structures lead to very fast kinetics and improved current density for lithium deposition-dissolution processes. Hence the electrolyte is used in a lithium metal battery against a high mass loading (~12 mg/cm<sup>2</sup>) LFP cathode which was cycled at a relatively high current rate of 1mA/cm<sup>2</sup> for 350 cycles without capacity fading and offered an overall coulombic efficiency of >99.8 %. Additionally, the rate performance demonstrated that this electrolyte is capable of passing current density as high as 7mA/cm<sup>2</sup> without any electrolytic decomposition and offers a superior capacity retention. We have also demonstrated an ‘anode free’ LFP-Cu cell which was cycled over 50 cycles and achieved an average coulombic efficiency of 98.74%. The coordination chemistry and (electro)chemical understanding as well as the excellent cycling stability collectively leads toward a breakthrough in realizing the practical applicability of this ether aided ionic liquid electrolytes in lithium metal battery applications, while delivering high energy density in a prototype cell.

scholarly journals dual-ion charge-discharge behaviors of Na-NiNc and NiNc-NiNc batteries

2021 ◽  
Author(s):  
Jinkwang Hwang ◽  
Rika Hagiwara ◽  
Hiroshi Shinokubo ◽  
Ji-Young Shin
Keyword(s):  
Discharge Capacity ◽  
Electrode Material ◽  
High Stability ◽  
Coulombic Efficiency ◽  
Active Electrode ◽  
High Discharge ◽  
High Discharge Capacity ◽  
Charge Discharge ◽  
High Coulombic Efficiency

Dual-ion sodium-organic secondary batteries were provided with antiaromatic porphyrinoid, NiNc as an active electrode material, which implemented inherent charge-discharge behaviors with high discharge capacity, high stability, high Coulombic efficiency with...

A 2D/2D graphitic carbon nitride/N-doped graphene hybrid as an effective polysulfide mediator in lithium–sulfur batteries

2019 ◽  
Vol 3 (9) ◽  
pp. 1807-1815 ◽  
Author(s):  
Junsheng Ma ◽  
Mingpeng Yu ◽  
Huanyu Ye ◽  
Hongquan Song ◽  
Dongxue Wang ◽  
...  
Keyword(s):  
Carbon Nitride ◽  
Coulombic Efficiency ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Lithium Sulfur Batteries ◽  
Doped Graphene ◽  
Template Free ◽  
Lithium Sulfur ◽  
High Coulombic Efficiency

A heterostructured host composed of porous g-C3N4 and N-doped graphene was fabricated by a template-free strategy. The hybrid display excellent cyclability and high coulombic efficiency due to the enhanced polysulfide anchoring-conversion capability.

scholarly journals Surface-engineered mesoporous silicon microparticles as high-Coulombic-efficiency anodes for lithium-ion batteries

Nano Energy ◽  
2019 ◽  
Vol 61 ◽  
pp. 404-410 ◽  
Author(s):  
Jiangyan Wang ◽  
Lei Liao ◽  
Hye Ryoung Lee ◽  
Feifei Shi ◽  
William Huang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Mesoporous Silicon ◽  
High Coulombic Efficiency

Metal–organic framework derived amorphous VOx coated Fe3O4/C hierarchical nanospindle as anode material for superior lithium-ion batteries

Nanoscale ◽  
2020 ◽  
Vol 12 (32) ◽  
pp. 16901-16909
Author(s):  
Bowen Cong ◽  
Yongyuan Hu ◽  
Shanfu Sun ◽  
Yu Wang ◽  
Bo Wang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
Coulombic Efficiency ◽  
Metal Organic Framework ◽  
Lithium Ion ◽  
Cycling Stability ◽  
Rate Performance ◽  
Metal Organic ◽  
High Coulombic Efficiency ◽  
Organic Framework

A novel Fe3O4/C@VOx hierarchical nanospindle anode material for LIBs has been successfully designed and fabricated through a MOF-derived route, which delivers high coulombic efficiency, outstanding cycling stability and rate performance.

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