Deep Discharge Cycle Life of Cells Constructed with Wrought Antimonial Lead Grids

1981 ◽  
Vol 128 (8) ◽  
pp. 1641-1647 ◽  
Author(s):  
J. L. Devitt ◽  
M. Myers
Keyword(s):  
Cycle Life ◽  
Discharge Cycle ◽  
Antimonial Lead

Cellulose Separators with Integrated Carbon Nanotube Interlayers for Lithium-Sulfur Batteries: An Investigation into the Complex Interplay Between Cell Components

2019 ◽  
Author(s):  
Yu-Chuan Chien ◽  
Ruijun Pan ◽  
Ming-Tao Lee ◽  
Leif Nyholm ◽  
Daniel Brandell ◽  
...  
Keyword(s):  
Coulombic Efficiency ◽  
Solid Electrolyte Interphase ◽  
Holistic Approach ◽  
Cycle Life ◽  
Complex Interplay ◽  
Positive Electrodes ◽  
Lithium Sulfur Batteries ◽  
Cell Components ◽  
Redox Shuttle ◽  
Lithium Sulfur

This work aims to address two major roadblocks in the development of lithium-sulfur (Li-S) batteries: the inefficient deposition of Li on the metallic Li electrode and the parasitic "polysulfide redox shuttle". These roadblocks are here approached, respectively, by the combination of a cellulose separator with a cathode-facing conductive porous carbon interlayer, based on their previously reported individual benefits. The cellulose separator increases cycle life by 33%, and the interlayer by a further 25%, in test cells with positive electrodes with practically relevant specifications and a relatively low electrolyte/sulfur (E/S) ratio. Despite the prolonged cycle life, the combination of the interlayer and cellulose separator increases the polysulfide shuttle current, leading to reduced Coulombic efficiency. Based on XPS analyses, the latter is ascribed to a change in the composition of the solid electrolyte interphase (SEI) on Li. Meanwhile, electrolyte decomposition is found to be slower in cells with cellulose-based separators, which explains their longer cycle life. These counterintuitive observations demonstrate the complicated interactions between the cell components in the Li-S system and how strategies aiming to mitigate one unwanted process may exacerbate another. This study demonstrates the value of a holistic approach to the development of Li-S chemistry.<br>

Cycle life testing and modeling of graphite/LiCoO2 cells under different state of charge ranges

2016 ◽  
Vol 327 ◽  
pp. 394-400 ◽  
Author(s):  
Saurabh Saxena ◽  
Christopher Hendricks ◽  
Michael Pecht
Keyword(s):  
State Of Charge ◽  
Cycle Life ◽  
Life Testing

scholarly journals High-cycle-life and high-loading copolymer network with potential application as a soft actuator

2019 ◽  
Vol 182 ◽  
pp. 108010 ◽  
Author(s):  
Hafeez Ur Rehman ◽  
Yujie Chen ◽  
Mikael S. Hedenqvist ◽  
Radan Pathan ◽  
Hezhou Liu ◽  
...  
Keyword(s):  
Potential Application ◽  
Cycle Life ◽  
High Loading ◽  
Soft Actuator ◽  
Copolymer Network

Prognostics of battery cycle life in the early-cycle stage based on hybrid model

Energy ◽  
2021 ◽  
Vol 221 ◽  
pp. 119901
Author(s):  
Yu Zhang ◽  
Zhen Peng ◽  
Yong Guan ◽  
Lifeng Wu
Keyword(s):  
Hybrid Model ◽  
Cycle Life

An aqueous rechargeable lithium ion battery with long cycle life and overcharge self-protection

2021 ◽  
Author(s):  
Zhiguo Hou ◽  
Lei Zhang ◽  
Jianwu Chen ◽  
Yali Xiong ◽  
Xueqian Zhang ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
Lithium Ion ◽  
Cycling Stability ◽  
Cycle Life ◽  
Long Cycle ◽  
Full Cell ◽  
Long Cycle Life ◽  
Excellent Cycling Stability ◽  
Self Protection

Zn2+ added into electrolyte can effectively suppress H2 evolution. Therefore, a LiMn2O4/NaTi2(PO4)3 full cell exhibits enhanced overcharging performance and excellent cycling stability up to 10 000 cycles.

scholarly journals A Hierarchically Ordered Mesoporous-Carbon-Supported Iron Sulfide Anode for High-Rate Na-Ion Storage

Molecules ◽  
2021 ◽  
Vol 26 (14) ◽  
pp. 4349
Author(s):  
Anupriya K. Haridas ◽  
Natarajan Angulakshmi ◽  
Arul Manuel Stephan ◽  
Younki Lee ◽  
Jou-Hyeon Ahn
Keyword(s):  
Mesoporous Carbon ◽  
Anode Materials ◽  
Iron Sulfide ◽  
Carbon Composite ◽  
Ordered Mesoporous Carbon ◽  
Cycle Life ◽  
High Rate ◽  
Volume Changes ◽  
Ordered Mesoporous ◽  
Ion Storage

Sodium-ion batteries (SIBs) are promising alternatives to lithium-based energy storage devices for large-scale applications, but conventional lithium-ion battery anode materials do not provide adequate reversible Na-ion storage. In contrast, conversion-based transition metal sulfides have high theoretical capacities and are suitable anode materials for SIBs. Iron sulfide (FeS) is environmentally benign and inexpensive but suffers from low conductivity and sluggish Na-ion diffusion kinetics. In addition, significant volume changes during the sodiation of FeS destroy the electrode structure and shorten the cycle life. Herein, we report the rational design of the FeS/carbon composite, specifically FeS encapsulated within a hierarchically ordered mesoporous carbon prepared via nanocasting using a SBA-15 template with stable cycle life. We evaluated the Na-ion storage properties and found that the parallel 2D mesoporous channels in the resultant FeS/carbon composite enhanced the conductivity, buffered the volume changes, and prevented unwanted side reactions. Further, high-rate Na-ion storage (363.4 mAh g−1 after 500 cycles at 2 A g−1, 132.5 mAh g−1 at 20 A g−1) was achieved, better than that of the bare FeS electrode, indicating the benefit of structural confinement for rapid ion transfer, and demonstrating the excellent electrochemical performance of this anode material at high rates.

scholarly journals Anion Coordination Improves High-Temperature Performance and Stability of NaPF6-Based Electrolytes for Supercapacitors

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4409
Author(s):  
J. Landon Tyler ◽  
Robert L. Sacci ◽  
Jagjit Nanda
Keyword(s):  
Thermal Stability ◽  
Electrolyte Solution ◽  
Elevated Temperatures ◽  
Electrochemical Impedance ◽  
Cycle Life ◽  
Stable Complex ◽  
Complexing Agents ◽  
Anion Coordination ◽  
Decomposition Processes ◽  
Hexamethyl Phosphoramide

Electrolyte stability can be improved by incorporating complexing agents that bind key decomposition intermediates and slow down decomposition. We show that hexamethyl-phosphoramide (HMPA) extends both the thermal stability threshold of sodium hexafluorophosphate (NaPF6) in dimethoxyethane (DME) electrolyte and the cycle life of double-layer capacitors. HMPA forms a stable complex with PF5, an intermediate in PF6 anion thermal degradation. Unbound, this intermediate leads to autocatalytic degradation of the electrolyte solution. The results of electrochemical impedance spectroscopy (EIS) and galvanostatic cycling measurements show large changes in the cell without the presence of HMPA at higher temperatures (≥60 °C). Fourier transform infrared spectroscopy (FTIR) on the liquid and gas phase of the electrolyte shows without HMPA the formation of measurable amounts of PF5 and HF. The complimentary results of these measurements proved the usefulness of using Lewis bases such as HMPA to inhibit the degradation of the electrolyte solution at elevated temperatures and potentially lead to improve cycle life of a nonaqueous capacitor. The results showed a large increase in capacitance retention during cycling (72% retention after 750,000 cycles). The results also provide evidence of major decomposition processes (0% capacitance retention after 100,000 cycles) that take place at higher temperatures without the additive of a thermal stability additive such as HMPA.

scholarly journals Quantification of the ion transport mechanism in protective polymer coatings on lithium metal anodes

2021 ◽  
Author(s):  
Hongyao Zhou ◽  
Haodong Liu ◽  
Xing Xing ◽  
Zijun Wang ◽  
Sicen Yu ◽  
...  
Keyword(s):  
Ion Transport ◽  
Transport Mechanism ◽  
Polymer Coatings ◽  
Rechargeable Batteries ◽  
Cycle Life ◽  
Lithium Metal ◽  
Lithium Metal Anodes ◽  
Protective Polymer ◽  
Deposition Morphology ◽  
Metal Anodes

Protective Polymer Coatings (PPCs) protect lithium metal anodes in rechargeable batteries to stabilize the Li/electrolyte interface and to extend the cycle life by reducing parasitic reactions and improving the lithium deposition morphology.

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