Synthesis and Electrochemical Behaviour of Ramsdellite LiCrTiO4

2002 ◽  
Vol 756 ◽  
Author(s):  
F. García-Alvarado ◽  
M. Martín-Gil ◽  
A. Kuhn
Keyword(s):  
High Temperature ◽  
Open Circuit Voltage ◽  
Electrochemical Behaviour ◽  
Specific Capacity ◽  
Rechargeable Batteries ◽  
Open Circuit ◽  
The Other ◽  
Operating Voltage ◽  
Lithium Rechargeable Batteries ◽  
Average Operating

ABSTRACTA ramsdellite with composition LiCrTiO4 has been obtained by heating the spinel of same composition to high temperature. The new ramsdellite has been investigated in view of its possible use as an electrode material in lithium rechargeable batteries. Lithium can be partially extracted from ramsdellite LiCrTiO4 and further intercalated into, by contrast to the spinel of same composition. The average operating voltage during lithium extraction is 4 Volts vs. lithium, and the process produces a specific capacity of 90 mAh/g at 0.1 mA/cm2. On the other hand, upon reduction from open circuit voltage, lithium can be reversibly intercalated into the ramsdellite polymorph at ca. 1.5 V vs. lithium yielding a rechargeable capacity of 110 mAh/g at 0.1 mA/cm2.

scholarly journals Study of 10kW molten carbonate fuel cell power generation system and its performance test

2020 ◽  
Author(s):  
Chengzhuang Lu ◽  
Ruiyun Zhang ◽  
Hao Li ◽  
Jian Cheng ◽  
Shisen Xu ◽  
...  
Keyword(s):  
High Temperature ◽  
Fuel Cell ◽  
Current Density ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Molten Carbonate Fuel Cell ◽  
Operating Voltage ◽  
Molten Carbonate ◽  
Fuel Cell Stack ◽  
Carbonate Fuel Cell

Abstract High-temperature fuel cells are a power technology that can improve the efficiency of electricity generation and achieve near-zero emissions of carbon dioxide. The present work explores the performance of the 10kW high-temperature molten carbonate fuel cell (MCFC). The key materials of the molten carbonate fuel cell single cell were characterized and analyzed by X-ray diffraction(XRD) and scanning electron microscope (SEM). The results show that the pore size of key electrode material was 6.5 μm and the matrix material is α-LiAlO 2 .The open circuit voltage of the single cell is 1.23 V in experiment. The current density is greater than 100 mA / cm^2 when the operating voltage is 0.7 V. The 10 kW fuel cell stack was constitutive of 80 pieces single fuel cells with area of 2000 cm 2 . The open circuit voltage of the stack reaches above 85 V. The fuel cell stack power and current density can reach 11.7 kW and 104.5 mA/cm^2 when the operating voltage is 56 V. The influence and long-term stable operation of the stack were also analyzed and discussed. The successful operation of 10kW high temperature fuel cell promotes the scale of domestic fuel cell and provides the research basis of fuel cell capacity enhancement and distributed generation in the next step.

scholarly journals Study and performance test of 10 kW molten carbonate fuel cell power generation system

2021 ◽  
Author(s):  
Chengzhuang Lu ◽  
Ruiyun Zhang ◽  
Guanjun Yang ◽  
Hua Huang ◽  
Jian Cheng ◽  
...  
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Fuel Cell ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Molten Carbonate Fuel Cell ◽  
Operating Voltage ◽  
Molten Carbonate ◽  
Fuel Cell Stack ◽  
Carbonate Fuel Cell

AbstractThe use of high-temperature fuel cells as a power technology can improve the efficiency of electricity generation and achieve near-zero emissions of carbon dioxide. This work explores the performance of a 10 kW high-temperature molten carbonate fuel cell. The key materials of a single cell were characterized and analyzed using X-ray diffraction and scanning electron microscopy. The results show that the pore size of the key electrode material is 6.5 µm and the matrix material is α-LiAlO2. Experimentally, the open circuit voltage of the single cell was found to be 1.23 V. The current density was greater than 100 mA/cm2 at an operating voltage of 0.7 V. The 10 kW fuel cell stack comprised 80 single fuel cells with a total area of 2000 cm2 and achieved an open circuit voltage of greater than 85 V. The fuel cell stack power and current density could reach 11.7 kW and 104.5 mA/cm2 at an operating voltage of 56 V. The influence and long-term stable operation of the stack were also analyzed and discussed. The successful operation of a 10 kW high-temperature fuel cell promotes the large-scale use of fuel cells and provides a research basis for future investigations of fuel cell capacity enhancement and distributed generation in China.

scholarly journals Study of 10kW molten carbonate fuel cell power generation system and its performance test

2020 ◽  
Author(s):  
Chengzhuang Lu ◽  
Ruiyun Zhang ◽  
Hao Li ◽  
Jian Cheng ◽  
Shisen Xu ◽  
...  
Keyword(s):  
High Temperature ◽  
Fuel Cell ◽  
Current Density ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Molten Carbonate Fuel Cell ◽  
Operating Voltage ◽  
Molten Carbonate ◽  
Fuel Cell Stack ◽  
Carbonate Fuel Cell

Abstract High-temperature fuel cells are a power technology that can improve the efficiency of electricity generation and achieve near-zero emissions of carbon dioxide. The present work explores the performance of the 10kW high-temperature molten carbonate fuel cell (MCFC). The key materials of the molten carbonate fuel cell single cell were characterized and analyzed by X-ray diffraction(XRD) and scanning electron microscope (SEM). The results show that the pore size of key electrode material was 6.5 μm and the matrix material is α-LiAlO2.The open circuit voltage of the single cell is 1.23 V in experiment. The current density is greater than 100 mA / cm^2 when the operating voltage is 0.7 V. The 10 kW fuel cell stack was constitutive of 80 pieces single fuel cells with area of 2000 cm2. The open circuit voltage of the stack reaches above 85 V. The fuel cell stack power and current density can reach 11.7 kW and 104.5 mA/cm^2 when the operating voltage is 56 V. The influence and long-term stable operation of the stack were also analyzed and discussed. The successful operation of 10kW high temperature fuel cell promotes the scale of domestic fuel cell and provides the research basis of fuel cell capacity enhancement and distributed generation in the next step.

An exceptionally large energy cathode with the K–SO4–Cu conversion reaction for potassium rechargeable batteries

2021 ◽  
Author(s):  
Yongseok Lee ◽  
Jung-Keun Yoo ◽  
Hyunyoung Park ◽  
Wonseok Ko ◽  
Jungmin Kang ◽  
...  
Keyword(s):  
Rechargeable Batteries ◽  
Large Energy ◽  
Electrochemical Performances ◽  
Operating Voltage ◽  
Conversion Reaction ◽  
Average Operating

A nano-sized CuSO4/carbon (N-CSO/C) composite achieves outstanding electrochemical performances with a high average operating voltage of ∼2.8 V (vs. K+/K).

Theoretical study of SnS2 encapsulated in Graphene as a promising anode material for K−ion batteries

2021 ◽  
Author(s):  
Xuxin Kang ◽  
Wei Xu ◽  
Xiangmei Duan
Keyword(s):  
Anode Material ◽  
Density Functional ◽  
Open Circuit Voltage ◽  
Electronic Conductivity ◽  
Density Functional Theory Calculations ◽  
Rechargeable Batteries ◽  
Open Circuit ◽  
Functional Theory ◽  
The Density Functional Theory ◽  
Low K

Abstract Rechargeable batteries with superior electronic conductivity, large capacity, low diffusion barriers and moderate open circuit voltage have attracted amount attention. Due to abundant resources and safety, as well as the high voltage and energy density, potassium ion batteries (KIBs) could be an ideal alternative to next−generation of rechargeable batteries. Based on the density functional theory calculations, we find that the SnS2 monolayer expands greatly during the potassiumization, which limits its practical application. The construction of graphene/SnS2/graphene (G/SnS2/G) heterojunction effectively prevents SnS2 sheet from deformation, and enhances the electronic conductivity. Moreover, the G/SnS2/G has not only a high theoretical special capacity of 680 mAh/g, but an ultra−low K diffusion barrier (0.08 eV) and an average open circuit voltage (0.22 V). Our results predict that the G/SnS2/G heterostructure could be used as a promising anode material for KIBs.

A study on open circuit voltage reduction as a main drawback of Zn–polyaniline rechargeable batteries

2005 ◽  
Vol 155 (3) ◽  
pp. 480-484 ◽  
Author(s):  
M.S. Rahmanifar ◽  
M.F. Mousavi ◽  
M. Shamsipur ◽  
H. Heli
Keyword(s):  
Open Circuit Voltage ◽  
Rechargeable Batteries ◽  
Open Circuit ◽  
Main Drawback

High specific capacity and excellent stability of interface-controlled MWCNT based anodes in lithium ion battery

2011 ◽  
Vol 1313 ◽  
Author(s):  
Indranil Lahiri ◽  
Sung-Woo Oh ◽  
Yang-Kook Sun ◽  
Wonbong Choi
Keyword(s):  
Electrode Materials ◽  
Specific Capacity ◽  
High Energy ◽  
Rechargeable Batteries ◽  
Operating Voltage ◽  
Li Ion Batteries ◽  
High Specific Capacity ◽  
Capacity Degradation ◽  
Li Ion ◽  
Very High

ABSTRACTRechargeable batteries are in high demand for future hybrid vehicles and electronic devices markets. Among various kinds of rechargeable batteries, Li-ion batteries are most popular for their obvious advantages of high energy and power density, ability to offer higher operating voltage, absence of memory effect, operation over a wider temperature range and showing a low self-discharge rate. Researchers have shown great deal of interest in developing new, improved electrode materials for Li-ion batteries leading to higher specific capacity, longer cycle life and extra safety. In the present study, we have shown that an anode prepared from interface-controlled multiwall carbon nanotubes (MWCNT), directly grown on copper current collectors, may be the best suitable anode for a Li-ion battery. The newly developed anode structure has shown very high specific capacity (almost 2.5 times as that of graphite), excellent rate capability, nil capacity degradation in long-cycle operation and introduced a higher level of safety by avoiding organic binders. Enhanced properties of the anode were well supported by the structural characterization and can be related to very high Li-ion intercalation on the walls of CNTs, as observed in HRTEM. This newly developed CNT-based anode structure is expected to offer appreciable advancement in performance of future Li-ion batteries.

Effect of Temperature on Performance Parameters of Metallurgical Grade Polysilicon Solar Cells

2011 ◽  
Vol 148-149 ◽  
pp. 1252-1255 ◽  
Author(s):  
Li Fu Zhang ◽  
Yi Tan ◽  
Zhen Qiang Yang ◽  
Ze Fei Gao ◽  
Ying Nie
Keyword(s):  
Solar Cells ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Effect Of Temperature ◽  
Stable Operation ◽  
Operating Voltage ◽  
Water Cooling ◽  
Quartic Equation ◽  
Metallurgical Silicon ◽  
The Relationship

By the stable operation of the experiments in actual outdoor conditions nearly a year, we find that the property of metallurgical silicon solar cells proves to be stable. The results show that the relationship between S-P could be expressed as a quartic equation. As the higher surface temperature of solar cells at noon on sunny day, both the open circuit voltage and the operating voltage are lower, the output power is reduced. It is concluded that the water cooling on the surface of the solar cells when the temperature T>50°C could improve power generation efficiency.

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