共查询到10条相似文献,搜索用时 15 毫秒
1.
Jianneng Liang Dachang Chen Keegan Adair Qian Sun Nathaniel Graham Holmes Yang Zhao Yipeng Sun Jing Luo Ruying Li Li Zhang Shangqian Zhao Shigang Lu Huan Huang Xiaoxing Zhang Chandra Veer Singh Xueliang Sun 《Liver Transplantation》2021,11(1):2002455
Polyethylene oxide (PEO) based solid polymer electrolytes (SPEs) are incompatible with the 4 V class cathodes such as LiCoO2 due to the limited electrochemical oxidation window of PEO. Herein, a number of binders including commonly used binders PEO, polyvinylidene fluoride (PVDF), and carboxyl-rich polymer (CRP) binders such as sodium alginate (Na-alginate) and sodium carboxymethyl cellulose, are studied for application in the 4 V class all-solid-state polymer batteries (ASSPBs). The results show ASSPBs with CRP binders exhibit superior cycling performance up to 1000 cycles (60% capacity retention, almost 10 times higher than those with PEO and PVDF binders). Synchrotron-based X-ray absorption spectroscopy (XAS), morphology studies and density functional theory studies indicate that, with their carboxyl groups, CRPs can strongly bind the electrode materials together, and work as coating materials to protect the cathode/SPE interface. Cyclic voltammetry studies indicate that CRP binders are more stable at high voltage compared to PEO and PVDF. The stability under high voltage and the coating property of CRP binders contribute to stable cathode/SPE interfaces as disclosed by the X-ray photoelectron spectroscopy and Co L-edge XAS results, enabling long cycling life, high performance 4 V class ASSPBs. 相似文献
2.
Julen Castillo Asier Soria-Fernández Sergio Rodriguez-Peña Jokin Rikarte Adrián Robles-Fernández Itziar Aldalur Rosalía Cid Jose Antonio González-Marcos Javier Carrasco Michel Armand Alexander Santiago Daniel Carriazo 《Liver Transplantation》2024,14(1):2302378
The growing requirements for electrified applications entail exploring alternative battery systems. Lithium-sulfur batteries (LSBs) have emerged as a promising, cost-effective, and sustainable solution; however, their practical commercialization is impeded by several intrinsic challenges. With the aim of surpassing these challenges, the implementation of a holistic LSB concept is proposed. To this end, the effectiveness of coupling a high-performing 2D graphene-based sulfur cathode with a well-suited sparingly solvating electrolyte (SSE) is reported. The incorporation of bis(fluorosulfonyl)imide (LiFSI) salt to tune sulfolane and 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropylether based SSE enables the formation of a robust and compact lithium fluoride-rich solid electrolyte interphase. Consequently, the lithium compatibility is improved, achieving a high Coulombic efficiency (CE) of 98.8% in the Li||Cu cells and enabling thin and dense lithium depositions. When combined with a high-performing 2D graphene-based sulfur cathode, a symbiotic effect is shown, leading to high discharge capacities, remarkable rate capability (2.5 mAh cm−2 at C/2), enhanced cell stability, and wide temperature applicability. Furthermore, the scalability of this strategy is successfully demonstrated by assembling high-performing monolayer prototype cells with a total capacity of 93 mAh, notable capacity retention of 70% after 100 cycles, and a high average CE of 99%. 相似文献
3.
Xinyu Da Jing Chen Yanyang Qin Jianyun Zhao Xin Jia Yuanjun Zhao Xuetian Deng Yanan Li Na Gao Yaqiong Su Qiang Rong Xiangpeng Kong Junqiao Xiong Xiaofei Hu Shujiang Ding Guoxin Gao 《Liver Transplantation》2024,14(11):2303527
All-solid-state lithium metal batteries (ASSLMBs) hold great promise for the development of next-generation high-safety, high-energy-density lithium batteries, but still face the challenges of lithium dendrite growth and thickness. Herein, the ultrathin PEO-based composite solid polymer electrolyte (denoted as PAL) supported by a low-density self-supporting aramid nanofiber (ANF) aerogel framework is developed. The ANF aerogel obtained by a novel CO2-assisted induced self-assembly method has a well-designed bilayer structure with double cross-linking degree. Benefiting from the intermolecular interaction between ANFs and PEO, the PAL achieves an ultrathin thickness (20 µm) with excellent thermal stability and mechanical strength. Meanwhile, due to the modulation of ionic pathways by the functionalized ANF, the PAL achieves uniform lithium deposition without dendrites, resulting in stable long cycling (1400 h) for symmetric cells. Consequently, the Li|PAL|LiFePO4 (LFP) cell has excellent long-term cycling stability (1 C, >700 cycles, Coulombic efficiency > 99.8%) and fast charge/discharge performance (rate, 10 C). More practically, the Li|PAL|LFP cell achieves an energy density of 180 Wh kg−1 due to the ability to match a high-loading (8 mg cm−2) cathode. Furthermore, the double-layer Li|PAL|LFP pouch cell demonstrates excellent flexibility and safety in cycling and abuse tests. 相似文献
4.
Sulfur‐Embedded Activated Multichannel Carbon Nanofiber Composites for Long‐Life,High‐Rate Lithium–Sulfur Batteries
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Despite the 3–5 fold higher energy density than the conventional Li‐ion cells at a lower cost, commercialization of Li–S batteries is hindered by the insulating nature of sulfur and the dissolution of intermediate polysulfides (Li2S X , 4 < X ≤ 8) into the electrolyte. The authors demonstrate here multichannel carbon nanofibers that are composed of parallel mesoporous channels connected with micropores as sulfur containment. In addition, hydroxyl functional groups are formed on the carbon surface through a chemical activation to enhance the interaction between sulfur and carbon. In the sulfur embedded composite, the mesoporous multichannel enhances the active material utilization and sulfur loading, while the micropores act as a reaction chamber for sulfur component and trap site for polysulfide with the assistance of the functional groups. This sulfur–carbon composite electrode with 2.2 mg cm?2 sulfur displays excellent performance with high rate capability (initial capacity of 1351 mA h g?1 at C/5 rate and 847 mA h g?1 at 5C rate), maintaining 920 mA h g?1 even after 300 cycles (a decay of 0.07% per cycle). Furthermore, a stable reversible capacity of as high as ≈1100 mA h g?1 is realized with a higher sulfur loading of 4.6 mg cm?2. 相似文献
5.
Qiang Ma Xian‐Xiang Zeng Junpei Yue Ya‐Xia Yin Tong‐Tong Zuo Jia‐Yan Liang Qi Deng Xiong‐Wei Wu Yu‐Guo Guo 《Liver Transplantation》2019,9(13)
Herein, a composite polymer electrolyte with a viscoelastic and nonflammable interface is designed to handle the contact issue and preclude Li dendrite formation. The composite polymer electrolyte (cellulose acetate/polyethylene glycol/Li1.4Al0.4Ti1.6P3O12) exhibits a wide electrochemical window of 5 V (vs Li+/Li), a high Li+ transference number of 0.61, and an excellent ionic conductivity of above 10?4 S cm?1 at 60 °C. In particular, the intimate contact, low interfacial impedance, and fast ion‐transport process between the electrodes and solid electrolytes can be simultaneously achieved by the viscoelastic and nonflammable layer. Benefiting from this novel design, solid lithium metal batteries with either LiFePO4 or LiCoO2 as cathode exhibit superior cyclability and rate capability, such as a discharge capacity of 157 mA h g?1 after 100 cycles at C/2 and 97 mA h g?1 at 5C for LiFePO4 cathode. Moreover, the smooth and uniform Li surface after long‐term cycling confirms the successful suppression of dendrite formation. The viscoelastic and nonflammable interface modification of solid electrolytes provides a promising and general strategy to handle the interfacial issues and improves the operative safety of solid lithium metal batteries. 相似文献
6.
Chemical Immobilization and Conversion of Active Polysulfides Directly by Copper Current Collector: A New Approach to Enabling Stable Room‐Temperature Li‐S and Na‐S Batteries
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Peirong Li Lu Ma Tianpin Wu Hualin Ye Junhua Zhou Feipeng Zhao Na Han Yeyun Wang Yunling Wu Yanguang Li Jun Lu 《Liver Transplantation》2018,8(22)
Room‐temperature Li/Na‐S batteries are promising energy storage solutions, but unfortunately suffer from serious cycling problems rooted in their polysulfide intermediates. The conventional strategy to tackle this issue is to design host materials for trapping polysulfides via weak physical confinement and interfacial chemical interactions. Even though beneficial, their capability for the polysulfide immobilization is still limited. Herein, the unique sulfiphilic nature of metallic Cu is revisited. Upon the exposure to polysulfide in aqueous or aprotic solution, the surface sulfidization rapidly takes place, resulting in the formation of Cu2S nanoflake arrays with tunable texture. When the sulfidized Cu current collector is directly used as the sulfur‐equivalent cathode, it enables high‐performance Li/Na‐S batteries at room temperature with reasonable high sulfur loading. Specific capacities up to ≈1200 mAh g?1 for Li‐S and ≈400 mAh g?1 for Na‐S are measured when normalized to the amount of equivalent sulfur, and can be readily sustained for >1000 cycles. 相似文献
7.
Ultra‐Lightweight 3D Carbon Current Collectors: Constructing All‐Carbon Electrodes for Stable and High Energy Density Dual‐Ion Batteries
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Zhili Zhou Na Li Yazheng Yang Haosen Chen Shuqiang Jiao Wei‐Li Song Daining Fang 《Liver Transplantation》2018,8(26)
Dual‐ion batteries (DIBs) attract great interest because they allow two types of ions for reversibly intercalating into electrodes, resulting in various advantages. However, there are three critical problems using graphite‐based cathodes, namely, low active material proportion in the electrodes, current collector corrosion, and massive cathode variation. For addressing these problems, an ultra‐lightweight 3D carbon current collector (CCC) is developed to fabricate all‐carbon electrodes as both cathodes and anodes. Compared with the conventional DIBs using Al and Cu foils as current collectors, the DIBs with 3D CCC of electrically conductive pathways and sufficient ionic diffusion channels deliver enhanced specific capacity stabilized around 140 and 120 mAh g?1 at 0.5 and 1C, respectively. The electrochemically inert 3D CCC could essentially promote the energy density when calculating the entire electrode mass, along with long‐life cycle stability of 1000 cycles at 5C and no electrochemical corrosion on either anodes or cathodes. With an in situ optical microscope, the cathode expansion is found to massively reduce because the porous 3D CCC could effectively alleviate the huge volume. The results suggest a novel strategy for achieving low‐cost and high energy density DIBs with both mechanically and electrochemically stable features. 相似文献
8.
Wenqiang Wang Dongya Wang Guiyou Wang Mengyao Zheng Gengchao Wang 《Liver Transplantation》2020,10(25)
The shuttle of polysulfide and severe volume change of sulfur cathodes, are the bottlenecks in the practical application of lithium–sulfur batteries, and need to be solved through further exploration of simple and scalable strategies. Herein, an elastic and conductive coating layer is designed and synthesized, by combining water soluble conducting polymer modified carbon nanotubes (PASANTs) with crosslinked waterborne polyurethane (cWPU). It shows high electronic conductivity and excellent resilience. As a result, a lithium–sulfur battery with cWPU/PASANTs coated cathode is able to achieve an outstanding cycle stability with a capacity of 70.8% after 500 cycles at 0.5C and an excellent rate performance (specific capacity of 1130 mAh g?1 at 0.1C and maintain 68.2% at 2C). This work embodies a systematic design concept, which shows the application prospects of large‐scale production, and is expected to be further applied to other easily pulverized high‐specific‐capacity materials such as silicon and tin. 相似文献
9.
Lithium‐Ion Batteries: Flexible Composite Solid Electrolyte Facilitating Highly Stable “Soft Contacting” Li–Electrolyte Interface for Solid State Lithium‐Ion Batteries (Adv. Energy Mater. 22/2017)
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Luyi Yang Zijian Wang Yancong Feng Rui Tan Yunxing Zuo Rongtan Gao Yan Zhao Lei Han Ziqi Wang Feng Pan 《Liver Transplantation》2017,7(22)
10.
Flexible Composite Solid Electrolyte Facilitating Highly Stable “Soft Contacting” Li–Electrolyte Interface for Solid State Lithium‐Ion Batteries
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Luyi Yang Zijian Wang Yancong Feng Rui Tan Yunxing Zuo Rongtan Gao Yan Zhao Lei Han Ziqi Wang Feng Pan 《Liver Transplantation》2017,7(22)
A flexible composite solid electrolyte membrane consisting of inorganic solid particles (Li1.3Al0.3Ti1.7(PO4)3), polyethylene oxide (PEO), and boronized polyethylene glycol (BPEG) is prepared and investigated. This membrane exhibits good stability against lithium dendrite, which can be attributed to its well‐designed combination components: the compact inorganic lithium ion conducting layer provides the membrane with good mechanical strength and physically barricades the free growth of lithium dendrite; while the addition of planar BPEG oligomers not only disorganizes the crystallinity of the PEO domain, leading to good ionic conductivity, but also facilitates a “soft contact” between interfaces, which not only chemically enables homogeneous lithium plating/stripping on the lithium metal anode, but also reduces the polarization effects. In addition, by employing this membrane to a LiFePO4/Li cell and testing its galvanostatic cycling performances at 60 °C, capacities of 158.2 and 94.2 mA h g?1 are delivered at 0.1 C and 2 C, respectively. 相似文献