scholarly journals Amorphous mesoporous GeO x anode for Na-ion batteries with high capacity and long lifespan

2018 ◽  
Vol 5 (1) ◽  
pp. 171477 ◽  
Author(s):  
Kangze Shen ◽  
Ning Lin ◽  
Tianjun Xu ◽  
Ying Han ◽  
Yitai Qian
Keyword(s):  
Room Temperature ◽  
Pore Diameter ◽  
High Capacity ◽  
Rate Capability ◽  
Reversible Capacity ◽  
Hierarchical Architecture ◽  
Average Pore ◽  
Wet Chemistry ◽  
Ion Storage

It is recently demonstrated that amorphous Ge anode shows higher reversible Na-ion storage capacity (590 mA h g −1 ) than crystallized Ge anode (369 mA h g −1 ). Here, amorphous GeO x anode is prepared by a simple wet-chemistry reduction route at room temperature. The obtained amorphous GeO x shows a porous hierarchical architecture, accompanied with a Brunauer–Emmett–Teller surface area of 159 m 2  g −1 and an average pore diameter of 14 nm. This unique structure enables the GeO x anode to enhance the Na-ion/electron diffusion rate, and buffer the volume change. As anode for Na-ion battery, high reversible capacity over 400 mA h g −1 , fine rate capability with a capacity of 200 mA h g −1 maintained at 3.0 A g −1 and long-term cycling stability with 270 mA h g −1 even over 1000 cycles at 1.0 A g −1 are obtained.

Boosting the potassium-ion storage performance of a carbon anode by chemically regulating oxygen-containing species

2019 ◽  
Vol 55 (94) ◽  
pp. 14147-14150 ◽  
Author(s):  
Rui Zhang ◽  
Haibo Li ◽  
Rui Li ◽  
Denghu Wei ◽  
Wenjun Kang ◽  
...  
Keyword(s):  
Rate Capability ◽  
Reversible Capacity ◽  
Potassium Ion ◽  
Cycling Stability ◽  
Carbon Anode ◽  
Storage Performance ◽  
Ion Storage ◽  
Melamine Foam

The oxygen-containing species in melamine foam carbons are chemically regulated. The optimized carbon anode shows an enhanced potassium-ion storage performance in terms of reversible capacity, rate capability, and long-term cycling stability.

An MXene/CNTs@P nanohybrid with stable Ti–O–P bonds for enhanced lithium ion storage

2019 ◽  
Vol 7 (38) ◽  
pp. 21766-21773 ◽  
Author(s):  
Shixue Zhang ◽  
Huan Liu ◽  
Bin Cao ◽  
Qizhen Zhu ◽  
Peng Zhang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
High Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycling Stability ◽  
Ion Storage

A Ti3C2Tx/CNTs@P nanohybrid with stable Ti–O–P bonds is simply fabricated, which exhibits high capacity, excellent long-term cycling stability and superior rate capability as an anode for lithium ion batteries.

Fast lithium-ion storage of Nb2O5 nanocrystals in situ grown on carbon nanotubes for high-performance asymmetric supercapacitors

RSC Advances ◽  
2015 ◽  
Vol 5 (51) ◽  
pp. 41179-41185 ◽  
Author(s):  
Xiaolei Wang ◽  
Ge Li ◽  
Ricky Tjandra ◽  
Xingye Fan ◽  
Xingcheng Xiao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
High Performance ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Energy ◽  
Asymmetric Supercapacitors ◽  
Ion Storage ◽  
Energy And Power Density

Nanocomposites of Nb2O5 NCs in situ grown on CNTs are successfully developed with excellent rate capability, leading to the successful fabrication of asymmetric supercapacitors with high energy and power density and long-term cycling stability.

In situ synthesis of GeO2/reduced graphene oxide composite on Ni foam substrate as a binder-free anode for high-capacity lithium-ion batteries

2015 ◽  
Vol 3 (4) ◽  
pp. 1619-1623 ◽  
Author(s):  
Heyuan Qiu ◽  
Lingxing Zeng ◽  
Tongbin Lan ◽  
Xiaokun Ding ◽  
Mingdeng Wei
Keyword(s):  
High Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Cycling Performance ◽  
Dip Coating ◽  
Reduced Graphene ◽  
Binder Free ◽  
Hydrolysis Of

The GeO2/RGO electrode is successfully fabricated via a facile dip-coating route cooperated with in situ hydrolysis of GeCl4 and used directly as a binder-free anode for LIBs. This material exhibited high reversible capacity, good cycling performance and excellent rate capability.

Uniform yolk–shell Sn4P3@C nanospheres as high-capacity and cycle-stable anode materials for sodium-ion batteries

2015 ◽  
Vol 8 (12) ◽  
pp. 3531-3538 ◽  
Author(s):  
Jun Liu ◽  
Peter Kopold ◽  
Chao Wu ◽  
Peter A. van Aken ◽  
Joachim Maier ◽  
...  
Keyword(s):  
Anode Materials ◽  
High Capacity ◽  
Rate Capability ◽  
Reversible Capacity ◽  
Cycling Performance ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
High Reversible Capacity ◽  
Very High

Uniform yolk–shell Sn4P3@C nanospheres exhibit very high reversible capacity, superior rate capability and stable cycling performance for Na-ion batteries.

scholarly journals Hard Carbon Derived from Avocado Peels as a High-Capacity, High-Performance Anode Material for Sodium-Ion Batteries

2021 ◽  
Author(s):  
Francielli Genier ◽  
Shreyas Pathreeker ◽  
Robson Schuarca ◽  
Mohammad Islam ◽  
Ian Hosein
Keyword(s):  
High Performance ◽  
High Capacity ◽  
Rate Capability ◽  
Reversible Capacity ◽  
Cycling Performance ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Hard Carbon ◽  
Storage Technologies ◽  
Carbon Based

Deriving battery grade materials from natural sources is a key element to establishing sustainable energy storage technologies. In this work, we present the use of avocado peels as a sustainable source for conversion into hard carbon based anodes for sodium ion batteries. The avocado peels are simply washed and dried then proceeded to a high temperature conversion step. Materials characterization reveals conversion of the avocado peels in high purity, highly porous hard carbon powders. When prepared as anode materials they show to the capability to reversibly store and release sodium ions. The hard carbon-based electrodes exhibit excellent cycling performance, namely, a reversible capacity of 352.55 mAh/g at 0.05 A/g, rate capability up to 86 mAh/g at 3500 mA/g, capacity retention of >90%, and 99.9% coulombic efficiencies after 500 cycles. This study demonstrates avocado derived hard carbon as a sustainable source that can provide excellent electrochemical and battery performance as anodes in sodium ion batteries.

scholarly journals Three-Dimensional Carbon-Coated LiFePO4 Cathode with Improved Li-Ion Battery Performance

Coatings ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1137
Author(s):  
Can Wang ◽  
Xunlong Yuan ◽  
Huiyun Tan ◽  
Shuofeng Jian ◽  
Ziting Ma ◽  
...  
Keyword(s):  
High Performance ◽  
Electrode Materials ◽  
Three Dimensional ◽  
High Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Economic Benefits ◽  
Synthesis Process ◽  
Carbon Coated

LiFePO4 (LFPO)has great potential as the cathode material for lithium-ion batteries; it has a high theoretical capacity (170 m·A·h·g−1), high safety, low toxicity and good economic benefits. However, low conductivity and a low diffusion rate inhibit its future development. To overcome these weaknesses, three-dimensional carbon-coated LiFePO4 that incorporates a high capacity, superior conductivity and low volume expansion enables faster electron transport channels. The use of Cetyltrimethyl Ammonium Bromid (CTAB) modification only requires a simple water bath and sintering, without the need to add a carbon source in the LFPO synthesis process. In this way, the electrode shows excellent reversible capacity, as high as 159.8 m·A·h·g−1 at 2 C, superior rate capability with 97.3 m·A·h·g−1at 5 C and good cycling ability, preserving ~84.2% capacity after 500 cycles. By increasing the ion transport rate and enhancing the structural stability of LFPO nanoparticles, the LFPO-positive electrode achieves excellent initial capacity and cycle life through cost-effective and easy-to-implement carbon coating. This simple three-dimensional carbon-coated LiFePO4 provides a new and simple idea for obtaining comprehensive and high-performance electrode materials in the field of lithium cathode materials.

β-NaVP2O7 as a Superior Electrode Material for Na-Ion Batteries

2019 ◽  
Author(s):  
Oleg Drozhzhin ◽  
Ilya Tertov ◽  
Anastasia Alekseeva ◽  
Dmitry A. Aksyonov ◽  
Keith Stevenson ◽  
...  
Keyword(s):  
Electrode Material ◽  
Low Voltage ◽  
Discharge Rate ◽  
Rate Capability ◽  
Reversible Capacity ◽  
Operating Voltage ◽  
Sodium Cations ◽  
Ion Storage ◽  
Average Operating ◽  
Voltage Region

<p>Herein, we present a novel <i>β</i>-polymorph of sodium vanadium pyrophosphate NaVP<sub>2</sub>O<sub>7</sub> with the KAlP<sub>2</sub>O<sub>7</sub>-type structure obtained via hydrothermal synthesis and further thermal dehydration of a hydrophosphate intermediate. <i>β</i>-NaVP<sub>2</sub>O<sub>7</sub> demonstrates attractive electrochemical behavior as a Na-ion positive electrode (cathode) material with practically achieved reversible capacity of 104 mAh/g at C/10 current density, average operating voltage of 3.9 V vs. Na/Na<sup>+ </sup>and only 0.5% volume change between the charged and discharged states. Electrode material exhibits excellent C-rate capability and cycling stability, providing the capacity of 90 mAh/g at 20C discharge rate and < 1% capacity loss after 100 charge-discharge cycles. At low voltage region (≈1.5 V vs. Na/Na<sup>+</sup>), <i>β</i>-NaVP<sub>2</sub>O<sub>7</sub> reversibly intercalates additional sodium cations leading to unprecedented overall Na-ion storage ability exceeding 250 mAh/g within the 1.5 – 4.4 V vs. Na/Na<sup>+</sup> voltage region. This material is one of only a few materials that exhibits reversible sodium ion storage capabilities over such a large potential window. </p>

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