scholarly journals Stretchable batteries with gradient multilayer conductors

2019 ◽  
Vol 5 (7) ◽  
pp. eaaw1879 ◽  
Author(s):  
Minsu Gu ◽  
Woo-Jin Song ◽  
Jaehyung Hong ◽  
Sung Youb Kim ◽  
Tae Joo Shin ◽  
...  
Keyword(s):  
Self Assembly ◽  
Multiple Scales ◽  
Discharge Rate ◽  
Rate Capability ◽  
Lithium Ion ◽  
Charge Storage ◽  
Storage Devices ◽  
Essential Components ◽  
Stretchable Conductors ◽  
A Charge

Stretchable conductors are essential components in next-generation deformable and wearable electronic devices. The ability of stretchable conductors to achieve sufficient electrical conductivity, however, remains limited under high strain, which is particularly detrimental for charge storage devices. In this study, we present stretchable conductors made from multiple layers of gradient assembled polyurethane (GAP) comprising gold nanoparticles capable of self-assembly under strain. Stratified layering affords control over the composite internal architecture at multiple scales, leading to metallic conductivity in both the lateral and transversal directions under strains of as high as 300%. The unique combination of the electrical and mechanical properties of GAP electrodes enables the development of a stretchable lithium-ion battery with a charge-discharge rate capability of 100 mAh g−1 at a current density of 0.5 A g−1 and remarkable cycle retention of 96% after 1000 cycles. The hierarchical GAP nanocomposites afford rapid fabrication of advanced charge storage devices.

scholarly journals Synthesis and Characterization of LiFePO4–PANI Hybrid Material as Cathode for Lithium-Ion Batteries

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2834
Author(s):  
Cesario Ajpi ◽  
Naviana Leiva ◽  
Max Vargas ◽  
Anders Lundblad ◽  
Göran Lindbergh ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Discharge Rate ◽  
Electrochemical Characterizations ◽  
Rate Capability ◽  
Lithium Ion ◽  
Chemical Oxidation ◽  
Degree Of Crystallinity ◽  
Favorable Effect ◽  
A Charge ◽  
Charge Discharge

This work focuses on the synthesis of LiFePO4–PANI hybrid materials and studies their electrochemical properties (capacity, cyclability and rate capability) for use in lithium ion batteries. PANI synthesis and optimization was carried out by chemical oxidation (self-assembly process), using ammonium persulfate (APS) and H3PO4, obtaining a material with a high degree of crystallinity. For the synthesis of the LiFePO4–PANI hybrid, a thermal treatment of LiFePO4 particles was carried out in a furnace with polyaniline (PANI) and lithium acetate (AcOLi)-coated particles, using Ar/H2 atmosphere. The pristine and synthetized powders were characterized by XRD, SEM, IR and TGA. The electrochemical characterizations were carried out by using CV, EIS and galvanostatic methods, obtaining a capacity of 95 mAhg−1 for PANI, 120 mAhg−1 for LiFePO4 and 145 mAhg−1 for LiFePO4–PANI, at a charge/discharge rate of 0.1 C. At a charge/discharge rate of 2 C, the capacities were 70 mAhg−1 for LiFePO4 and 100 mAhg−1 for LiFePO4–PANI, showing that the PANI also had a favorable effect on the rate capability.

scholarly journals High Discharge Rate Lithium Ion Batteries with the Composite Cathode of LiFePO4/Mesocarbon Nanobead

2010 ◽  
Vol 177 ◽  
pp. 208-210
Author(s):  
Yi Jie Gu ◽  
Cui Song Zeng ◽  
Yu Bo Chen ◽  
Hui Kang Wu ◽  
Hong Quan Liu ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Room Temperature ◽  
Discharge Rate ◽  
Rate Capability ◽  
Lithium Ion ◽  
Composite Cathode ◽  
Rate Performance ◽  
High Discharge ◽  
High Discharge Rate ◽  
Lifepo4 Cathode

Olivine compounds LiFePO4 were prepared by the solid state reaction, and the electrochemical properties were studied with the composite cathode of LiFePO4/mesocarbon nanobead. High discharge rate performance can be achieved with the designed composite cathode of LiFePO4/mesocarbon nanobead. According to the experiment results, batteries with the composite cathode deliver discharge capacity of 1087mAh for 18650 type cell at 20C discharge rate at room temperature. The analysis shows that the uniformity of mesocarbon nanobead around LiFePO4 can supply enough change for electron transporting, which can enhance the rate capability for LiFePO4 cathode lithium ion batteries. It is confirmed that lithium ion batteries with LiFePO4 as cathode are suitable to electric vehicle application.

A novel calendula-like MnNb2O6 anchored on graphene sheet as high-performance intercalation pseudocapacitive anode for lithium-ion capacitors

2019 ◽  
Vol 7 (6) ◽  
pp. 2855-2863 ◽  
Author(s):  
Xu Zhang ◽  
Jinyu Zhang ◽  
Shuying Kong ◽  
Kai Zhu ◽  
Jun Yan ◽  
...  
Keyword(s):  
Graphene Sheet ◽  
Anode Material ◽  
High Performance ◽  
Storage Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycling Stability ◽  
Charge Storage ◽  
First Time ◽  
Superior Cycling Stability

In this paper, for the first time, we investigated MnNb2O6 as a new rate capability type anode material for lithium-ion capacitors (LICs), which exhibit excellent charge storage capacity and reasonably superior cycling stability.

scholarly journals Complexing Agents on Carbon Content and Lithium Storage Capacity of LiFePO4/C Cathode Synthesized via Sol-Gel Approach

2016 ◽  
Vol 2016 ◽  
pp. 1-7
Author(s):  
C. Guan ◽  
H. Huang
Keyword(s):  
Discharge Rate ◽  
Sol Gel ◽  
Electronic Conductivity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cost Effective ◽  
Reversible Capacity ◽  
Complexing Agents ◽  
Lithium Storage ◽  
Synthesis Conditions

Olivine-structured LiFePO4faces its intrinsic challenges in terms of poor electrical conductivity and lithium-ion diffusion capability for application to lithium-ion batteries. Cost-effective sol-gel approach is advantageous to in situ synthesize carbon-coated LiFePO4(LiFePO4/C) which can not only improve electronic conductivity but also constrain particle size to nanometer scale. In this study, the key parameter is focused on the choice and amount of chelating agents in this synthesis route. It was found that stability of complexing compounds has significant impacts on the carbon contents and electrochemical properties of the products. At the favorable choice of precursors, composition, and synthesis conditions, nanocrystalline LiFePO4/C materials with appropriate amount of carbon coating were successfully obtained. A reversible capacity of 162 mAh/g was achieved at 0.2Crate, in addition to good discharge rate capability.

HIERARCHICAL Li4Ti5O12 MICROSPHERES AS A HIGH POWER ANODE MATERIAL FOR LITHIUM ION BATTERIES

2013 ◽  
Vol 01 (04) ◽  
pp. 1340013
Author(s):  
HONGJUN LUO ◽  
HONGSEN LI ◽  
LAIFA SHEN ◽  
PING NIE ◽  
JIE WANG ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Large Scale ◽  
Discharge Rate ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycling Performance ◽  
Electrochemical Analysis ◽  
High Rate ◽  
Diffraction Field ◽  
Hydrothermal Route

In this paper, hierarchical Li 4 Ti 5 O 12 microspheres were successfully synthesized in a large scale via a facile hydrothermal route. X-ray diffraction, field emission scanning electron microscopy and transmission electron microscopy were used to characterize the obtained Li 4 Ti 5 O 12 microspheres and the results indicate that the monodispersed Li 4 Ti 5 O 12 microspheres with ca. 2 μm in diameter was assembled by well-crystalline nanoparticles. Electrochemical analysis indicated that the Li 4 Ti 5 O 12 microspheres have superior rate capability and cycling performance. At the charge–discharge rate of 0.2, 1, 2, 5, 10 and 20 C, the discharge capacities of Li 4 Ti 5 O 12 microspheres are 169.2, 163.5, 158.3, 136.4, 117.6 and 94.3 mAh g−1, respectively. Excellent capacity retention of 98.7% was achieved after 100 cycles at 1 C rate and it can still maintained 91% even at high rate of 10 C.

Ionomer Binders Can Improve Discharge Rate Capability in Lithium-Ion Battery Cathodes

2011 ◽  
Vol 158 (2) ◽  
pp. A207 ◽  
Author(s):  
Jung-Min Oh ◽  
Olt Geiculescu ◽  
Darryl DesMarteau ◽  
Stephen Creager
Keyword(s):  
Lithium Ion Battery ◽  
Discharge Rate ◽  
Rate Capability ◽  
Lithium Ion

FeF3•0.33H2O@Carbon Nanosheets with Honeycomb Architectures for High-capacity Lithium-ion Cathode Storage by Enhanced Pseudocapacitance

2021 ◽  
Author(s):  
Liguo Zhang ◽  
Yu Litao ◽  
Oi Lun Li ◽  
Si-Young Choi ◽  
Ghuzanfar Saeed ◽  
...  
Keyword(s):  
Anode Materials ◽  
High Capacity ◽  
Lithium Ion ◽  
High Rate ◽  
Charge Storage ◽  
Li Ion Batteries ◽  
Carbon Nanosheets ◽  
Storage Devices ◽  
Li Ion ◽  
Increasing Demand

There is an increasing demand for current and future applications to obtain charge storage devices with both energy and power superiority. Recently, several high-rate pseudocapacitive anode materials in Li-ion batteries...

scholarly journals Increasing the Discharge Rate Capability of Lithium-Ion Cells with Laser-Structured Graphite Anodes: Modeling and Simulation

2018 ◽  
Vol 165 (7) ◽  
pp. A1563-A1573 ◽  
Author(s):  
Jan B. Habedank ◽  
Ludwig Kraft ◽  
Alexander Rheinfeld ◽  
Christina Krezdorn ◽  
Andreas Jossen ◽  
...  
Keyword(s):  
Modeling And Simulation ◽  
Discharge Rate ◽  
Rate Capability ◽  
Lithium Ion ◽  
Lithium Ion Cells ◽  
Graphite Anodes
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