Compared to CS-KCl, the CS-KOH electrode exhibits the most suitable
By a simple ball-milling and heat treatment method, pitch as carbon source and CaCO3 or MgO as pore-former, the high-rate capability three-dimensional porous carbon materials are synthesized. The porous carbon has an abundant porous structure with a specific surface area of ~ 94.6527 m2 g−1and pore volume of ~ 0.4311 ml g−1. The unique
In this study, we employed a unique method combining cellulose partial dissolution, phase separation, and in situ growth of zeolitic imidazolate frameworks (ZIFs) to optimize the pore structure of cellulose fiber membranes, and successfully fabricated a uniform nanoporous cellulose composite membrane.
As anode materials for lithium-ion batteries (LIBs), porous Fe 3 N/Fe 3 O 4 @C fibers delivered a reversible capacity of 964 mA h g −1 after 200 cycles at 2 A g −1 and long-term cycling stability (282 mA h g −1 after 2000 cycles at 5 A g −1). This work provides a method to regulate biphasic anode materials with desirable
Therefore, porous carbon composites exhibit excellent performance as
Lithium–sulfur (Li–S) rechargeable batteries have been expected to be lightweight energy storage devices with the highest gravimetric energy density at the single-cell level reaching up to 695
[4-15] Particularly, electrochemical storage devices, such as zinc-ion batteries (ZIBs), lithium-ion batteries (LIBs ), activated with NaOH has porous characteristics after carbonization to greatly increase the specific surface area of the fiber. Porous ACT was also used as a carbon substrate to design the structure based on its hollow characteristics, large specific
Notably, ultra-high molecular weight polyethylene (UHMWPE) plays a crucial role in lithium battery separator materials and is highly applied in the global automotive battery market [7,33,34]. Moreover, the UHMWPE membrane provides excellent safety protection for overcharging, short circuit, and explosions when the temperature rises, thus
The oxygen concentration distribution in the porous cathode of a lithium–air battery during discharge has been measured using a fine optical fiber sensor. The lithium–air battery has the highest theoretical capacity. However, for practical application, the lithium–air battery power density needs to be improved. To realize a more powerful aqueous lithium–air battery,
3 天之前· Developing High Energy Density Li-S Batteries via Pore-Structure Regulation of Porous Carbon Based Electrocatalyst. Pengpeng Zhang, Pengpeng Zhang. School of Materials science and Engineering, Zhengzhou University, Zhengzhou, 450001 China . State Centre for International Cooperation on Designer Low-Carbon & Environmental Materials (CDLCEM),
Silicon suffers from high volume variation and poor conductivity, which limits its commercial application in lithium-ion battery anode materials. To improve the stability of Si-based electrodes, the porous structure was
Silicon @ nitrogen-doped porous carbon fiber composite anodes synthesized by an in-situ reaction collection strategy for high-performance lithium-ion batteries Appl. Surf. Sci., 475 ( 2019 ), pp. 211 - 218, 10.1016/j.apsusc.2018.12.172
In Conclusion, we have developed a promising Si/Carbon composite for lithium-ion battery anodes. Not only providing sufficient mechanical support to alleviating volume change of silicon particles, the nanoporous fiber structure also offers sufficient ion transport pathway, which enhances the cycle stability and rate retention at the same time
In Conclusion, we have developed a promising Si/Carbon composite for
3 天之前· Developing High Energy Density Li-S Batteries via Pore-Structure Regulation of
As anode materials for lithium-ion batteries (LIBs), porous Fe 3 N/Fe 3 O 4
Yao [15] prepared Co and N co-doped carbon fibers network as freestanding electrode for lithium/sulfur batteries, in which cobalt metal can not only promote the redox reaction, but also promote the nucleation of lithium sulfide on the carbon fiber surface, reduce polarization and increase the discharge specific capacity. It can be seen that metal cobalt not
It has been verified that a high porosity separator membrane and a high conductivity electrolytic solution do not always provide the best performance for lithium-ion batteries, the performance depending also on pore connectivity and coulombic interactions between the mobile cations and the separator membrane [63, 64].
Currently, the most commonly utilized polymeric materials for producing porous membranes in rechargeable batteries, particularly LIBs, include polyethylene (PE), polypropylene (PP), poly (tetrafluoroethylene) (PTFE), poly (vinylidene fluoride) (PVDF), poly (methyl methacrylate) (PMMA), polyimide (PI), polyesters, poly (vinyl chloride) (PVC), pol...
In this study, a new porous LiFePO 4-graphite SBC is designed and fabricated by independently distributing battery materials and resin matrix on carbon fiber fabric in pattern lattice form to prepare electrodes prepreg. The cured porous composite framework supports the load-bearing function while limiting the electrochemical reaction in liquid electrolyte within
It has been verified that a high porosity separator membrane and a high
Therefore, porous carbon composites exhibit excellent performance as electrode materials for lithium ion batteries, lithium–sulfur batteries, and lithium–oxygen batteries. In this review, we summarize research progress on porous carbon composites with enhanced performance for rechargeable lithium batteries. We present the detailed synthesis
Developing high-performance lithium-sulfur batteries has become an important strategy to achieve sustainable development. In this study, a novel and high-performance stand-alone cathode material, containing Ni-plated viscose-based carbon fiber (VBCF/Ni) and hierarchical porous carbon (HPC), was prepared.The conductivity, adsorption and catalytic
Hierarchically porous membranes offer an effective platform for facilitating mass transport and ion diffusion in energy storage systems and have the potential to achieve novel battery configurations.
Using diatomite and lithium carbonate as raw materials, a porous Li4SiO4 ceramic separator is prepared by sintering. The separator has an abundant and uniform three-dimensional pore structure, excellent electrolyte wettability, and thermal stability. Lithium ions are migrated through the electrolyte and uniformly distributed in the three-dimensional pores of the
Notably, ultra-high molecular weight polyethylene (UHMWPE) plays a crucial role in lithium battery separator materials and is highly applied in the global automotive battery market [7,33,34]. Moreover, the UHMWPE
Compared to CS-KCl, the CS-KOH electrode exhibits the most suitable performance for lithium sulfur batteries. Pyrrolic N as the real reactive site improved the adsorption energy and degradation energy barrier for lithium polysulfides.
Hierarchically porous membranes offer an effective platform for facilitating mass transport and ion diffusion in energy storage systems and have the potential to achieve novel battery configurations.
Currently, the most commonly utilized polymeric materials for producing porous membranes in
More importantly, the asymmetric porous structured membrane with a dense layer can act as an active material and current collector, avoiding the use of separate current collectors, even conductive agents and binders in lithium-ion battery, which is beneficial for superior electrochemical performances in terms of high reversible capacity.
Therefore, porous carbon composites exhibit excellent performance as electrode materials for lithium ion batteries, lithium–sulfur batteries, and lithium–oxygen batteries. In this review, we summarize research progress on porous carbon composites with enhanced performance for rechargeable lithium batteries.
As the vital roles such as electrodes, interlayers, separators, and electrolytes in the battery systems, regulating the membrane porous structures and selecting appropriate membrane materials are significant for realizing high energy density, excellent rate capability, and long cycling stability of lithium rechargeable batteries (LRBs).
Cellulose fiber membranes have been of great interest in the battery research community due to their excellent electrolyte affinity and thermal stability. However, they have long been plagued by issues such as unevenly distributed large pores and poor mechanical strength. In this study, we employed a unique
To avoid the use of standard electrolyte solution, PEO quaternary composites containing a high fraction of the ionic liquid of N-methyl-N-butylpyrrolidinium bis (fluorosulfonyl) imide as separators for the lithium battery have been developed to improve electrochemical stability .
Future Perspectives The utilization of polyolefin porous membranes in commercial LIB materials has become widespread, and this technology has reached a level of maturity owing to its remarkable mechanical properties, chemical stability, and contribution to the circular economy.
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