CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zhenyuan Hu,Wei Bao,Yunfeng Zhang,Xin Jiang,Junjie Chen,Yi Zhang,Shikang Huo,Jinnan Zhang,Jinpeng Qin,Shenghan Li,Wenfan Guo,Hansong Cheng
The utilization of poly(ethylene oxide) (PEO)-based solid polymer electrolytes (SPEs) has long been deemed promising for the application of state-of-the-art lithium metal metals (LMBs), but still severely impeded by the insufficient Li-ion transporting channels and inhomogeneous Li deposition. Herein, the design of single-ion conductors (PSLi) modified graphene oxide nanosheets (GO-PSLi)-reinforced PEO-based SPEs to address these long-standing issues is proposed. The electronegative sulfonate-rich groups with lithiophilic features on GO-PSLi surface not only effectively enhance the dispersion of nanoparticles within the PEO matrix, but also provide fast Li-ion diffusion pathways. Meanwhile, introducing PSLi chains is also favorable to highly reducing the crystallization of composite SPEs through hydrogen interactions derived from the desired amide functional groups. This, in turn, facilitates segmental relaxation of the PEO backbone, leading to accelerates the Li-ion migration. As a proof of concept, the as-prepared composite SPEs demonstrate a good ionic conductivity of 2.2 × 10 −4 S cm −1 and a high lithium transference number of 0.53, significantly outperforming the pure PEO SPEs (1.0 × 10 −4 S cm −1 and 0.28, respectively) at 60 °C. In addition, the symmetrical Li||Li cells based on the composite SPEs show excellent reversible lithium plating/stripping performances with dendrite-free uniform lithium deposition over 1100 h under a current of 0.1 mA cm −2 at 60 °C. The Li||LiFePO 4 batteries also achieve an impressive capacity of 120.2 mAh g −1 at a high current density of 4C and deliver remarkable cycling abilities with 84.6% retention after 250 cycles under 1C at 60 °C. This study offers a facile and practical strategy to develop advanced composite PEO-based SPEs for safe and dendrite-free solid-state LMBs.
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高影响因子
COMPOSITES PART B-ENGINEERING
·
2022
·
IF 11.322
Kedi Cai,Tan Wang,Zhenhua Wang,Jiajun Wang,Lan Li,Chuangang Yao,Xiaoshi Lang
Lithium-sulfur (Li–S) batteries are considered to be promising next-generation rechargeable system. However, the shuttle effect for lithium polysulfides (LiPSs) and slow sulfur reaction kinetics due to multistep phase transitions severely limit the practical application of Li–S batteries. Herein, via dual-strategy of heterogeneous interface and defect engineering, a cocklebur-like sulfur host with the TiO 2 -VO x heterostructure (CTVHs) for long-life Li–S batteries is fabricated, and atomic-level clarification of the chemical interaction between the substrate and LiPSs from a theoretical viewpoint is achieved. Benefiting from the heterostructure, the high adsorption energy heterojunction interface works as capturing centers to trap LiPSs which ensures rapid diffusion to VO x . In addition, the defect-rich spiny VO x is endowed with high catalytic activity towards LiPSs and fast lithium-ion migration so as to effectively implement one-step adsorption diffusion transformation. DFT calculations show that the introduction of a heterostructure can change the electronic structure, thereby improving the adsorption capacity of CTVHs. Electrochemical measurements reveal favorable kinetics for Li 2 S deposition, better cyclability, and an outstanding discharge capacity. The CTVHs/S cathode delivers a slow capacity decay rate of 0.029% per cycle and achieves nearly 100% coulombic efficiency (CE) at 0.5 C over 1400 cycles. This proposed strategy provides broad prospects to promote the adsorption-conversion of LiPSs for long-life Li–S batteries.
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高影响因子
Small
·
2022
·Vol. 18
·期 28
·2202651
·
IF 15.153
Shuanglin Wu,Yingmei Yao,Xiaolin Nie,Zhifeng Yu,Yanting Yu,Fenglin Huang
Exploring a scalable strategy to fabricate a multifunctional separator is of great significance to overcome the challenges of lithium polysulfides (LiPSs) and dendritic growth in lithium-sulfur batteries (LSBs). Herein, a binder-free Janus separator is constructed by interfacial engineering. At the cathode interface, an ultra-thin covalent triazine piperazine film containing tailorable micropores and adsorption sites is decorated on polyacrylonitrile (PAN) membrane by in situ interfacial polymerization, building a triple barrier for LiPSs. The combination of steric hindrance and chemical adsorption reduces LiPS's migration by 81.85%. Meanwhile, at the anode interface, a fast-ionic conductor Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) is created on the surface of PAN nanofiber by magnetron sputtering to suppress dendrite growth. Even though there is no binder between the ceramic layer and the fibrous separator, sputtering creates an inter-embedded structure that ensures no depowering after cycling. Furthermore, the PAN-based separator displays a high temperature tolerance of 180 °C. Consequently, the cell delivers a high capacity of 1287.9 mAh g −1 at 0.5 C and stable cycling performance with an ultra-low capacity decay rate of 0.059% per cycle over 500 cycles. This work provides a scalable strategy for functionalizing separators to tackle the challenges in LSBs, which is binder-free, stripping-free, and essentially thickening-free.
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PubMed
高影响因子
Materials Today Sustainability
·
2022
·
IF 7.244
Y. Liu,H. Liu,L. Tian,L. Pang,X. Liu,J. Li
As a most promising potential next-generation energy storage system , lithium-sulfur batteries (Li–S batteries) received great attention in recent years. However, how to effectively prevent the shuttling effect and accelerate the redox reaction kinetics of polysulfides are still a challenge. Herein, a strategy of using the soft template as a pore-forming agent was proposed to prepare Mo 2 C/nitrogen-doped carbon hollow microflowers (marked as H–Mo 2 C/NC MFs), which was used as an efficient absorbent and electrocatalyst of polysulfides for Li–S batteries. Due to the physical limitations of assembling the special nanosheet into a hollow carbon matrix in the shape of a microflower, the H–Mo 2 C/NC MFs can be used as an appropriate S loading substrate. With the synergistic chemisorption from pyridine N sites and high content polar Mo 2 C nanoparticles , the as-prepared H–Mo 2 C/NC MFs can provide enhancing adsorption and catalytic conversion for polysulfides. As a result, the H–Mo 2 C/NC/S MFs-based cathode provides a high initial discharge capacity of 1104.8mAh/g at 0.2C. Even at the high rate of 1.0C, the initial capacity of 705.2mAh/g still shows good electrochemical performance, and in 1000 cycles, the average capacity decay rate is only 0.016%, with supercycle stability. This article provided a new strategy for a novel viewpoint for the reasonable design of conductive and polar materials for efficient and durable Li–S batteries.
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高影响因子
ADVANCED MATERIALS
·
2021
·Vol. 33
·期 11
·2004711
·
IF 30.849
Yuxuan Liu,Renzong Hu,Dechao Zhang,Jiangwen Liu,Fang Liu,Jie Cui,Zuopeng Lin,Jinsong Wu,Min Zhu
To achieve high ionic conductivity for solid electrolyte, an artificial Li-rich interface layer of about 60 nm thick has been constructed in polymer-based poly(ethylene oxide)-lithium bis(trifluoromethanesulfonyl)imide composite solid electrolyte (briefly noted as PEO m ) by adding Li-based alloys. As revealed by high-resolution transmission electron microscopy and electron energy loss spectroscopy, an artificial interface layer of amorphous feature is created around the Li-based alloy particles with the gradient distribution of Li across it. Electrochemical analysis and theoretical modeling demonstrate that the interface layer provides fast ion transport path and plays a key role in achieving high and stable ionic conductivity for PEO m -Li 21 Si 5 composite solid electrolyte. The PEO m -5%Li 21 Si 5 composite electrolyte exhibits an ionic conductivity of 3.9 × 10 –5 S cm −1 at 30 ° C and 5.6 × 10 −4 S cm −1 at 45 ° C. The LiFePO 4 | PEO m -5%Li 21 Si 5 | Li all-solid-state batteries could maintain a stable capacity of 129.2 mA h g −1 at 0.2 C and 30 ° C after 100 cycles, and 111.3 mA h g −1 after 200 cycles at 0.5 C and 45 ° C, demonstrating excellent cycling stability and high-rate capability.
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高影响因子
Nano-Micro Letters
·
2021
·Vol. 13
·期 1
·1-14
·
IF 16.419
Su Die,Pei Yi,Liu Li,Liu Zhixiao,Liu Junfang,Yang Min,Wen Jiaxing,Dai Jing,Deng Huiqiu,Cao Guozhong
The unique wire-in-wire structure endows TiO 2 /C nanofibers film with superior mechanical flexibility.
The wire-in-wire TiO 2 /C nanofibers (TiO 2 ww/CN) film shows outstanding electrochemical performances as free-standing anodes for Li/K-ion batteries and full cells.
The TiO 2 ww/CN film shows an extremely high pseudocapacitance contribution ratio in K-ion batteries.
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高影响因子
LANGMUIR
·
2020
·
IF 3.557
Lun Zhang,Kuo Wei,Juanjuan Yin,Jingxin Zhou,Lexin Zhang,Jinghong Li,Tifeng Jiao
Constructing the nanostructure of transition metal oxides for high energy density lithium-ion batteries has been widely studied recently. Prompted by the idea that the transition metal can serve as a catalyzer influence on the reversibility of solid–electrolyte interphase films, Co/MnO@C composite nanofibers were designed by electrospinning and chemical vapor deposition methods. The Co/MnO@C electrode showed superior electrochemical performance with a large capacity increase for the first 400 cycles and a high rate performance of 1345 mA h g–1 at 1000 mA g–1. There was no obvious decay of capacity over the whole 1000 cycles, demonstrating the excellent cycling stability of the samples. The new design and synthesis of the anodic materials may offer a prototype for high-performance and strong-stability batteries.
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PubMed
高影响因子
Nano Energy
·
2020
·
IF 16.602
Zhenjing Jiang,Tongyao Zhao,Jinjun Ren,Yanfei Zhang,Yuanzheng Yue
Recently it has been demonstrated that the electrochemical performances of semiconducting amorphous anodes for Li-ion batteries (LIBs) can be greatly enhanced by the discharging/charging induced nanocrystals . However, the structural origin of those nano-domains remains elusive, although it is critically important for designing superior glass anodes for LIBs. In this work, we probe the local structural evolution in a glass anode for LIBs during cycles by means of the state-of-the-art solid-state nuclear magnetic resonance (SSNMR). The structural evolution is manifested as the disassociation of the structural network into isolated units, followed by formation of different types of nano-domains with a high degree of order. These domains are highly favorable for rate capability and long-term cycling stability. From SSNMR and electrochemical characterizations, we have obtained a clear picture about the detailed redox reactions . These findings provide a chemical principle that is helpful for designing the stable glass electrodes for high-performance LiBs.
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Advanced Energy Materials
·
2021
·Vol. 11
·期 7
·2003082
·
IF 29.368
Xuan Wu,Wei Zhang,Naiqi Wu,Su-Seng Pang,Yi Ding,Guang He
Dealloying is a powerful technology to fabricate nanoporous materials with tunable structures and compositions for battery applications. Meanwhile, electrochemical dealloying is an intrinsic process for metal anodes that exhibits fundamental correlations with electrode morphologies and structures. In this work, Li-Ag composites are fabricated as a case study to understand the spontaneous structural evolution and the in situ formation of nanoporosity during a reversible lithiation/delithiation process. The rationally designed nanoporous AgLi (NPAgLi) framework with limited Li capacity (10 mAh cm −2 ) enables a dendrite-free anode with marginal volume variation upon long-term cycling, which can be attributed to the spatially confined reaction pattern along with efficient Li alloying/dealloying. Furthermore, full cell tests reveal the NPAgLi anode remains stable under practical conditions such as lean electrolyte (15 µL), large areal capacity (1.6 mAh cm −2 ), and high-loading cathode (12 mg cm −2 ). This work provides new perspectives on the in situ structural evolution of Li-rich alloy electrodes and the results are expected to contribute to the development of alkali metal anodes.
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IONICS
·
2020
·Vol. 26
·期 12
·6035-6047
·
IF 2.394
Yan Yinglin,Fan Chaojiang,Yang Yanyun,Xie Yigui,Cao Ye,Lin Jiaming,Zou Yiming,You Caiyin,Xu Yunhua,Yang Rong
In this study, three types of biomass with different structures were selected to synthesize carbon matrix in a cathode of Li-S battery. The influence of the structure of raw biomass on microstructure, sulfur-loading amount, and electrochemical performance was investigated in detail. The results demonstrated that the catkin-derived porous carbon (CPC) inherited the 1D-structured morphology and exhibited the highest specific surface area (2033.09 m 2 /g), the largest sulfur loading (53.72%), and the highest initial discharge specific capacity (1369.52 mA h g −1 ) under 0.1 C. Comparatively speaking, the wrinkled cloth-like sakura petal–derived porous carbon showed a better capacity (1218.14 mA h g −1 ) but poor cycling performance. And the 3D network structure of bamboo-derived porous carbon (BPC) exhibited a relatively high capacity retention. These results demonstrated that the structural feature of biomass raw materials plays an important role in the microstructure and electrochemical performance of the carbon products.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 25
·11535-11544
·
IF 3.553
Zeng Tianbiao,Zhang Chuhong
An oxalate-based hydrothermal approach has been applied to synthesize Ni 0.8 Mn 0.1 Co 0.1 ·C 2 O 4 ·2H 2 O “mixed oxalate,” and “mixed oxalate” has been lithiated to LiNi 0.8 Mn 0.1 Co 0.1 O 2 for Li-ion batteries cathode. Ni 2+ , Mn 2+ and Co 2+ can be precipitated quickly and effectively at 100 °C within 20 min without inert gas protection, and it was not needed to control the pH of the solution deliberately. After the “mixed oxalate” was lithiated to LiNi 0.8 Mn 0.1 Co 0.1 O 2 , as-synthesized LiNi 0.8 Mn 0.1 Co 0.1 O 2 can deliver 160–180 mAh g −1 at 1C during long-term cycling and showed one of the best electrochemical performances compared to some Ni-rich or Ni/Mn/Co-contained cathodes synthesized by similar procedures, i.e., higher reversible capacity in rate charge/discharge cycles. Considering the facile synthesis of “mixed oxalate,” this work may give rise to an inspiration for LiNi x Mn y Co 1− x − y O 2 cathodes research.
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高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2020
·
IF 4.006
Shanshan He,Xin Liu,Yanling Wang,Jianhua Xie,Heng Gao,Xiujiang Li,Zhibing Huang
Monascus mold produces useful bioactive compounds such as Monascus pigments, monacolin K, and ergosterol . In this study, metabolomics analysis was used to investigate the metabolic profile changes in Monascus aurantiacus Li AS3.4384 (MALA) induced by genistein at different fermentation times using UHPLC-Q-TOF-MS/MS. The addition of genistein was found to not only reduce citrinin but also suppress significant differential metabolites. A total of 21 significant differential metabolites were involved in the most significant metabolic pathways (impact >0.1). These metabolites affected the aspartic acid , glutamic acid pathway, tricarboxylic acid (TCA) cycle, pyruvate synthesis pathway, and lysine degradation pathway. Thus, the addition of genistein may change the precursor for citrinin synthesis of Monascus . These findings provide significant insight into the Monascus metabolic pathways affected by genistein and will help to improve the quality control and safety of Monascus in food and supplements.
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高影响因子
危险品化学品经营许可证（带存储）