scholarly journals In situ electrochemical conversion of CO2 in molten salts to advanced energy materials with reduced carbon emissions

2020 ◽  
Vol 6 (9) ◽  
pp. eaay9278 ◽  
Author(s):  
Wei Weng ◽  
Boming Jiang ◽  
Zhen Wang ◽  
Wei Xiao
Keyword(s):  
Carbon Emissions ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
High Rate ◽  
Carbon Anode ◽  
Energy Materials ◽  
Long Cycle Life ◽  
In Operando

Fixation of CO2 on the occasion of its generation to produce advanced energy materials has been an ideal solution to relieve global warming. We herein report a delicately designed molten salt electrolyzer using molten NaCl-CaCl2-CaO as electrolyte, soluble GeO2 as Ge feedstock, conducting substrates as cathode, and carbon as anode. A cathode-anode synergy is verified for coelectrolysis of soluble GeO2 and in situ–generated CO2 at the carbon anode to cathodic Ge nanoparticles encapsulated in carbon nanotubes (Ge@CNTs), contributing to enhanced oxygen evolution at carbon anode and hence reduced CO2 emissions. When evaluated as anode materials for lithium-ion batteries, the Ge@CNTs hybrid shows high reversible capacity, long cycle life, and excellent high-rate capability. The process contributes to metallurgy with reduced carbon emissions, in operando CO2 fixation to advanced energy materials, and upgraded conversion of carbon bulks to CNTs.

Electrochemical Properties of Micro-Sized Bismuth Anode for Sodium Ion Batteries

2020 ◽  
Vol 12 (9) ◽  
pp. 1429-1432
Author(s):  
Seunghwan Cha ◽  
Changhyeon Kim ◽  
Huihun Kim ◽  
Gyu-Bong Cho ◽  
Kwon-Koo Cho ◽  
...  
Keyword(s):  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Cycle Life ◽  
Sodium Ion ◽  
High Rate ◽  
Sodium Ion Batteries ◽  
Long Cycle ◽  
Long Cycle Life ◽  
High Reversible Capacity

Recently, sodium ion batteries have attracted considerable interest for large-scale electric energy storage as an alternative to lithium ion batteries. However, the development of anode materials with long cycle life, high rate, and high reversible capacity is necessary for the advancement of sodium ion batteries. Bi anode is a promising candidate for sodium ion batteries due to its high theoretical capacity (385 mAh g–1 or 3800 mAh l–1) and high electrical conductivity (7.7 × 105 S m –1). Herein, we report the preparation of Bi anode using micro-sized commercial Bi particles. DME-based electrolyte was used, which is well known for its high ionic conductivity. The Bi anode showed excellent rate-capability up to 16 C-rate, and long cycle life stability with a high reversible capacity of 354 mAh g–1 at 16 C-rate for 50 cycles.

Mass production of Li4Ti5O12 with a conductive network via in situ spray pyrolysis as a long cycle life, high rate anode material for lithium ion batteries

RSC Advances ◽  
2014 ◽  
Vol 4 (73) ◽  
pp. 38568-38574 ◽  
Author(s):  
Guodong Du ◽  
Brad R. Winton ◽  
Israa M. Hashim ◽  
Neeraj Sharma ◽  
Konstantin Konstantinov ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Spray Pyrolysis ◽  
Mass Production ◽  
Spray Pyrolysis Technique ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Rate ◽  
High Rate Capability ◽  
Long Cycle Life

Nanocrystalline Li4Ti5O12 was synthesized by an in situ spray pyrolysis technique followed by heat treatment in N2 for short periods of time, resulting in self-contained carbon originating from the organic synthetic precursors. The excellent high rate capability and full battery tests indicate that this is a promising 4 anode candidate for high power lithium-ion batteries.

In situ preparation of 3D graphene aerogels@hierarchical Fe3O4 nanoclusters as high rate and long cycle anode materials for lithium ion batteries

2015 ◽  
Vol 51 (9) ◽  
pp. 1597-1600 ◽  
Author(s):  
Lishuang Fan ◽  
Bingjiang Li ◽  
David W. Rooney ◽  
Naiqing Zhang ◽  
Kening Sun
Keyword(s):  
Anode Materials ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
High Rate ◽  
3D Graphene ◽  
High Reversible Capacity ◽  
In Situ Preparation ◽  
Novel Strategy

We describe a novel strategy for in situ fabrication of hierarchical Fe3O4 nanoclusters–GAs. Fe3O4 NCs–GAs deliver excellent rate capability and a high reversible capacity of 577 mAh g−1 over 300 cycles at the current density of 5.2 A g−1.

Mesoporous Co3V2O8 nanoparticles grown on reduced graphene oxide as a high-rate and long-life anode material for lithium-ion batteries

2016 ◽  
Vol 4 (17) ◽  
pp. 6264-6270 ◽  
Author(s):  
Guoxin Gao ◽  
Shiyao Lu ◽  
Bitao Dong ◽  
Yang Xiang ◽  
Kai Xi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
High Rate ◽  
Hybrid Nanocomposite ◽  
High Rate Capability ◽  
Long Cycle Life ◽  
Reduced Graphene

A hierarchical hybrid nanocomposite of reduced graphene oxide supported mesoporous Co3V2O8 nanoparticles has been successfully prepared. When evaluated as a promising anode for LIBs, the nanocomposite exhibits high reversible capacity, excellent high-rate capability and super-long cycle life.

scholarly journals Tailoring of Aqueous-Based Carbon Nanotube–Nanocellulose Films as Self-Standing Flexible Anodes for Lithium-Ion Storage

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 655 ◽  
Author(s):  
Hoang Kha Nguyen ◽  
Jaehan Bae ◽  
Jaehyun Hur ◽  
Sang Joon Park ◽  
Min Sang Park ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
High Surface ◽  
High Surface Area ◽  
Composite Films ◽  
Rate Capability ◽  
Morphological Characteristics ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
High Rate ◽  
Voltage Profile

An easy and environmentally friendly method was developed for the preparation of a stabilized carbon nanotube–crystalline nanocellulose (CNT–CNC) dispersion and for its deposition to generate self-standing CNT–CNC composite films. The composite films were carbonized at different temperatures of 70 °C, 800 °C, and 1300 °C. Structural and morphological characteristics of the CNT–CNC films were investigated by X-ray diffraction (XRD), Raman spectroscopy, and scanning electron microscopy (SEM), which revealed that the sample annealed at 800 °C (CNT–CNC800) formed nano-tree networks of CNTs with a high surface area (1180 m2·g−1) and generated a conductive CNC matrix due to the effective carbonization. The carbonized composite films were applied as anodes for lithium-ion batteries, and the battery performance was evaluated in terms of initial voltage profile, cyclic voltammetry, capacity, cycling stability, and current rate efficiency. Among them, the CNT–CNC800 anode exhibited impressive electrochemical performance by showing a reversible capacity of 443 mAh·g−1 at a current density of 232 mA·g−1 after 120 cycles with the capacity retention of 89% and high rate capability.

scholarly journals Nickel-Embedded Carbon Materials Derived from Wheat Flour for Li-Ion Storage

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4611
Author(s):  
Wen Ding ◽  
Xiaozhong Wu ◽  
Yanyan Li ◽  
Shuo Wang ◽  
Shuping Zhuo
Keyword(s):  
Anode Material ◽  
Wheat Flour ◽  
Lithium Ion ◽  
Nanocrystalline Structure ◽  
Reversible Capacity ◽  
Nickel Nitrate ◽  
Carbon Anode ◽  
Ion Storage ◽  
Superior Electrochemical Properties

The biomass-based carbons anode materials have drawn significant attention because of admirable electrochemical performance on account of their nontoxicity and abundance resources. Herein, a novel type of nickel-embedded carbon material (nickel@carbon) is prepared by carbonizing the dough which is synthesized by mixing wheat flour and nickel nitrate as anode material in lithium-ion batteries. In the course of the carbonization process, the wheat flour is employed as a carbon precursor, while the nickel nitrate is introduced as both a graphitization catalyst and a pore-forming agent. The in situ formed Ni nanoparticles play a crucial role in catalyzing graphitization and regulating the carbon nanocrystalline structure. Mainly owing to the graphite-like carbon microcrystalline structure and the microporosity structure, the NC-600 sample exhibits a favorable reversible capacity (700.8 mAh g−1 at 0.1 A g−1 after 200 cycles), good rate performance (51.3 mAh g−1 at 20 A g−1), and long-cycling durability (257.25 mAh g−1 at 1 A g−1 after 800 cycles). Hence, this work proposes a promising inexpensive and highly sustainable biomass-based carbon anode material with superior electrochemical properties in LIBs.

NiCo-LDH/Ti3C2 MXene hybrid materials for lithium ion battery with high-rate capability and long cycle life

2020 ◽  
Vol 50 ◽  
pp. 143-153 ◽  
Author(s):  
Rui Zhang ◽  
Zhe Xue ◽  
Jiaqian Qin ◽  
Montree Sawangphruk ◽  
Xinyu Zhang ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
Hybrid Materials ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycle Life ◽  
High Rate ◽  
High Rate Capability ◽  
Long Cycle ◽  
Long Cycle Life
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