Materials Today
·
2022
·
IF 26.943
Min Zhang,Kefan Zhou,Donghao Ma,Helin Wang,Xiaoyu Tang,Miao Bai,Fu Liu,Zhiqiao Wang,Yue Ma
The parasitic Li dendrite formation and retarded ion diffusion dynamics inhibit the deployment of solid-state batteries (SSBs) at high areal capacity loadings. Here, we present the modular design of the Li + percolating network by grafting the ionic-conductive polyether amine (PEA) at the multiple scales: the PEA modified zinc hydroxystannate (PEA@ZHS) (flame retardant units) and polyamide 6 (mechanical rigid units) are coherently introduced to optimize the PEO-based solid electrolyte (PX-PEA@ZHS) with the Young's modulus (3.41 GPa), ionic conductivity (4.29 × 10 −4 S cm −1 at 55 °C) and flame retardancy (22% reduction of heat release rate); on the other hand, PEA molecules are grafted onto the acetylene black additive to establish the dual conductive network, endowing two orders of magnitude increase of ionic conductivity for the high-compaction cathodes. The as-integrated symmetric cell exhibits a critical current density up to 0.8 mA cm −2 and cycling endurance for 1000 h at 0.2 mA cm −2 ; upon the SSBs assembly with the record high loading of LiFePO 4 (12.4 mg cm −2 ), the high-areal-capacity, cycling stability as well as the extreme temperature endurance till 110 °C are simultaneously realized, which inspire the rational design of commercially feasible, energy-dense, flame-resistance energy storage prototype.
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Yubing Guo,Ming Zhang,Zhen Ge,Zixuan Fang,Ziqiang Xu,Jintian Wu,Mengqiang Wu
Polyethylene oxide (PEO)-based solid polymer electrolytes exhibit promising commercial prospects due to their superior processability and scalability. However, limited ion transport and unstable electrode/electrolyte interface restrict their practical application. Herein, the paraelectric strontium titanate (STO) is introduced into PEO-based electrolytes to solve those problems. The electrostatic force originating from polarized STO weakens the coordination between EO and Li + and releases more free Li + , thus promoting ion transport inside the electrolyte. Numerous STOs form a new reverse electric field that inhibits lithium dendrites' vertical growth at the anode interface. Polarized STO triggers the generation of LiF, Li 2 O, and Li 3 N-riched solid electrolyte interphase (SEI), contributing to interfacial stability and Li + mobility. Consequently, polarized STO-modified PEO-based solid electrolyte has an outstanding ion conductivity of 0.61 mS cm −1 with a superior lithium stability of 5.29 V. Li/Li symmetric battery with STO-modified electrolyte undergoes >1200 h at 0.2 mA cm −2 . A large capacity retention of 85.3% after 850 cycles at 1 C is achieved for LFP/Li battery and be cycled 600 times even against a high-loading cathode (LFP:6 mg cm −2 ). This study provides a novel strategy to prepare composite-modified solid-state electrolytes that can be utilized in lithium metal batteries.
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Zhiyuan Yi,Kai Qu,Linlong Zhou,Qing Li,Zhi Xu
Metal-organic framework (MOF) glasses offer promising potential for membrane-based separations due to their excellent processability and structural versatility. However, their inherently disordered pore structures often lead to reduced porosity and limited ion transport performance. Here, we present a controlled unzipping polymer decomposition (CUPD) strategy for fabricating ZIF-62-based glass membrane featuring interconnected and negatively charged transport channels. Polystyrene sulfonic acid (PSS) is introduced as a sacrificial porogen during the melt-quenching process, wherein partial decomposition of its carbon backbone templates the formation of interconnected micropores. Simultaneously, the sulfonate groups stabilized by coordination with Zn sites, imparted negative surface charge to the channels, facilitating the selective ions transport. The optimized membrane fabricated by CUPD strategy achieves a Li + permeation rate of 0.64 mol m −2 h −1 , which is 60-fold higher than that of the pristine ZIF-62 glass membrane. This work provides a novel inspiration for constructing MOF-based membranes with interconnected channels with tunable property for advanced ion separation applications.
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Xiang Li,Binbin Dan,Shixuan Li,Xiang Liu,Di Wang
The sluggish kinetics linked to CO 2 evolution reaction (CO 2 ER) processes, coupled with substantial electrode passivation, impose considerable constraints on the practical application of Li-CO 2 batteries. This study utilized ultrasound tech to enhance the synergistic modulation of defects and piezoelectric properties. By the concurrent creation of high-concentration oxygen vacancies (OVs) and the amplification of the inherent piezoelectric polarization field in BaTiO 3 material, the hysteresis of CO 2 ER processes and the occurrence of electrode passivation in Li-CO 2 batteries has been significantly improved. Further investigations reveal that high OV concentrations cause electronic structure reconstruction, leading to band gap contraction and Fermi energy level upshift, meanwhile, the augmented piezoelectric polarization field facilitates the directional migration of carriers, facilitating the growth of Li 2 CO 3 via the inherent electric field. Based on this synergistic mechanism, reversible decomposition of Li 2 CO 3 has been realized and Li-CO 2 cells with ultrasonic BTO cathode even exhibits a long cycle life of 375 cycles at the current density of 500 mA g −1 . This one-step physical field synergistic regulation of defect states in ferroelectric materials and their piezoelectric properties establishes a novel paradigm and mechanistic foundation for overcoming efficiency bottlenecks in piezoelectric catalytic systems and Li-CO 2 batteries.
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产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2022
·Vol. 34
·期 40
·2201838
·
IF 32.086
Guiru Sun,Rui Gao,Hailiang Jiao,Dan Luo,Yan Wang,Zexu Zhang,Wei Lu,Ming Feng,Zhongwei Chen
The major challenges for Li-O 2 batteries are sluggish reaction kinetics and large overpotentials due to the cathode passivation resulting from insulative and insoluble Li 2 O 2 . Here, a novel nanodot (ND)-modified electrolyte is designed by employing cobalt bis(trifluoromethylsulfonyl)imide (Co(TFSI) 2 ) as an electrolyte additive. The Co(TFSI) 2 additive can react with discharge intermediate LiO 2 and product Li 2 O 2 to form CoO NDs. The generated CoO NDs are well dispersed in electrolyte, which integrates both the high catalytic activity of solid catalyst and the good wettability of soluble catalyst. Under the catalytis of CoO NDs, Li 2 O 2 is produced and deposits on the cathode together with them. At the recharge process, these well dispersed CoO NDs help to decompose solid Li 2 O 2 at a lower overpotential. The Li-O 2 cells with Co(TFSI) 2 exhibit a long cycle life of 200 cycles at a current density of 200 mA g −1 under a cutoff capacity of 1000 mAh g −1 , as well as a superior reversibility associated with the Li 2 O 2 formation and decomposition. The study is expected to broaden the range of electrolyte additives and provide a new view to developing highly dispersed NDs-based catalysts for Li-O 2 batteries.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Kaiyu Qi,Zeming Yuan,Yuan Hou,Ruichao Zhao,Bangwen Zhang
MoS 2 nanosheets have been widely explored as LIB anode materials due to higher theoretical capacity and weak interlayer interactions, but limited by their low conductivity and ease of stacking. Herein, we reported a novel Fe doped MoS 2 /reduced graphene oxide (Fe-MoS 2 /rGO) composite as LIB anode material and its one-step synthesis method. The results show that the synthesized Fe-MoS 2 /rGO composite has unique porous heterostructure , where networked Fe-MoS 2 nanosheets of several nm thickness grow upon crumpled rGO sheets with high specific area. Due to the Fe doping as well as the mild synthesis conditions, the resulting Fe-MoS 2 upon rGO sheets has wide interlayer spacing, abundant lattice defects and lower inner resistance. As a result, the Fe-MoS 2 /rGO electrode exhibits significant improvement in electrochemical performance relative to the non-doped MoS 2 /rGO electrode. The reversible capacities of Fe-MoS 2 /rGO electrode reach 1255 mAh/g (2nd circle) and 946 mAh g −1 (100th circle) with a retention of 75.4%. By comparison, the reversible capacities of MoS 2 /rGO electrode are only 654.1 mAh g −1 (2nd circle) and 429 mAh g −1 (100th circle) with a low retention of 64.1%.
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DOI
高影响因子
RARE METALS
·
2023
·Vol. 43
·期 3
·1153-1166
·
IF 8.8
Lu Li-Wen,Luo Hui,Li Guang-Xu,Li Yun,Wang Xin-Hua,Huang Cun-Ke,Lan Zhi-Qiang,Zhou Wen-Zheng,Guo Jin,Ismail Mohammad,Liu Hai-Zhen
The Li-Mg-B-H composite (2LiBH 4 + MgH 2 ) has a high capacity of 11.4 wt% as a hydrogen storage material. However, the slow kinetics and poor cycling stability severely restrict its practical applications. In this work, a layered Nb 2 C MXene was first synthesized and then introduced to tailor the kinetics and cycling stability of the Li-Mg-B-H composite. The milled 2LiH + MgB 2 composites were initially hydrogenated to obtain the 2LiBH 4 + MgH 2 composites. The 2LiBH 4 + MgH 2 + 5 wt% Nb 2 C can release 9.0 wt% H 2 in 30 min at 400 °C, while it is only 2.7 wt% for the undoped 2LiBH 4 + MgH 2 . The dehydrogenation activation energies of MgH 2 and LiBH 4 are 123 and 154 kJ·mol −1 respectively for the 5 wt% Nb 2 C-doped composite, lower than the undoped composite (164 and 165 kJ·mol −1 ). The 2LiBH 4 + MgH 2 + 5 wt% Nb 2 C possesses excellent cycling stability, with the reversible capacity only slightly reduced from 9.4 wt% for the 1st cycle to 9.3 wt% for the 20th cycle. Nb 2 C keeps stable in the composite and acts as an efficient catalyst for the Li-Mg-B-H composite. It is believed that both the layered structure and the active Nb element contribute to the enhanced hydrogen storage performances of the Li-Mg-B-H composite. This work confirms that the Nb 2 C MXene with layered structure has a significant enhancing impact on the Li-Mg-B-H hydrogen storage materials, which is different from the bulk NbC. Graphical abstract
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DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Yongbiao Sun,Jianfeng Tang,Guangyan Li,Yihuai Hua,Yunbing Sun,Suyang Hu,Xiaojin Wen
The Li + , K + , Mg 2+ and Ca 2+ -exchanged X zeolites were prepared using ion exchange method for producing efficient adsorbents that could be used in the purification of liquefied natural gas (LNG). The adsorption, separation and regeneration characteristics of the samples were systematically explored and discussed using static adsorption of pure gases, dynamic adsorption of a binary gas mixture (3%CO 2 and 97%CH 4 ) and regeneration experiments. The results showed that Li13X had the largest surface area of 520 m 2 /g, whereas Ca13X possessed the highest micropore volume of 0.25 m 3 /g with the smaller pore size observed from the pore size distribution . The adsorption capacity of Li13X for CO 2 (4.10 mmol/g) was almost the same as that of Ca13X (4.12 mmol/g), which were larger than all the other samples at 120 kPa and 30 °C. However, K13X had the highest static CO 2 /CH 4 separation factor of 46, which was due to the increased basicity of the framework. For the dynamic adsorption, Ca13X possessed the highest CO 2 /CH 4 separation factor of 93, and showed the smallest CH 4 adsorption capacity of 1.22 mmol/g. As for the regeneration of the proposed adsorbents, the heat requirement for CO 2 in dynamic was not only affected by the isosteric heat, but was also dependent on the competition between CH 4 and CO 2 . Moreover, the static and dynamic vacuum regenerations had the same tendency and mainly depended on the pore size distribution.
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Tianci Cao,Xiaopeng Cheng,Mingming Wang,Junxia Lu,Jiajia Niu,Huan Liu,Xianqiang Liu,Yuefei Zhang
Lithium (Li) metal is a promising candidate for next-generation anode materials with high energy densities. However, Li dissolution/deposition processes are limited at the upper surface in contact with the electrolyte, which brings a locally high current density and then results in dendritic Li growth. This restraint of the local surface reaction during cycling has not been solved by commonly used modification strategies. In this study, a three-dimensional (3D) Li+ conductive skeleton is activated from atomic layer deposition (ALD) coating Li3PO4 (LPO) on the surface of the Ni foam (LPNF). Then, the skeleton is efficiently constructed in the Li metal anode by the lower-temperature Li infusion. Ionic conductor LPO layers and electronic conductor Ni fibers supply charge transport channels between the electrolyte and the internal Li. The mixed conductive network realizes holistic charge transfer, which is proved by in situ scanning electron microscopy experiments. In virtue of dispersive dissolution/deposition and optimized electrochemical kinetics brought by a Li+ conductive network, the composited Li electrode presents an excellent symmetric battery cycling stability (over 1200 h) and enhanced rate performances (stable cycling even at 10.0 mA cm–2). When matching with a LiCoO2 (LCO) cathode, LCO||Li@LPNF full batteries exhibit a capacity retention of 80.8% over 250 cycles. During cycling, there was no evidence of dendrite growth and the remaining Li in the composited anode showed a smooth, compact, and well-combined condition with LPNF. Through constructing a 3D Li+ conductive network, the composited Li metal anode breaks through the limit of the local surface reaction; this work proposes a novel insight of realizing holistic charging/discharging for the dendrite-free Li metal anode.
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DOI
高影响因子
IONICS
·
2021
·Vol. 28
·期 1
·191-200
·
IF 2.817
Chen Zi-Liang,Gu Yi-Jing,Luo Gui-Yang,Huo Yong-Lin,Wu Fu-Zhong
Although researchers have previously examined whether graphene modified by sulfur can improve the electrochemical performance of LiFePO 4 /C composites, they have rarely examined whether it can do so during the synchronous synthesis of LiFePO 4 /C and sulfur-modified reduced graphene oxide (SG) via a one-step hydrothermal method. To answer this question, a series of olivine structure LiFePO 4 /C composites wrapped with SG were investigated. Subsequently, we found that SG can form a three-dimensional conductive network on the surface of the LiFePO 4 /C sample. In the process, XRD and HRTEM tests were undertaken as well. From the XRD test, the results show that SG does not affect the olivine structure of LiFePO 4 /C. In the HRTEM experiment, clear lattice fringes and a uniformly coated carbon layer on the sample surface were observed. Alongside these results, there were 4 others. First, the charge–discharge data showed that the electrochemical performance of the samples could be increased by SG modification. Second, sample S2 with a mass ratio of Na 2 S to rGO of 1:10 shows the best specific discharge capacity and stability. Third, the specific capacity of S2 is 163 mAhg −1 at 0.2 C, and the capacity retention is 108.23% even after 200 cycles at a magnification of 10 C. Fourth, according to EIS, the charge migrating resistance of S2 is 226.4 Ω, and the lithium-ion diffusion coefficient is 2.41 × 10 −14 cm 2 ·S −1 . The significance of these results is that they indicate that wrapping LiFePO 4 /C with SG significantly contributed to the improvement of its electrochemical performance.
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DOI
高影响因子
Frontiers in Chemistry
·
2020
·
IF 3.693
Yongliang Cui,Sufu Liu,Bo Liu,Donghuang Wang,Yu Zhong,Xuqing Zhang,Xiuli Wang,Xinhui Xia,Changdong Gu,Jiangping Tu
The notorious lithium dendrite growth, causing the safety concern, hinders the practical application of high-capacity Li metal anodes for rechargeable batteries. Here, a robust and highly ionic conductive solid electrolyte interphase (SEI) layer to protect Li metal anode is in-situ constructed by introducing trace additive of tetrapotassium heptaiodobismuthate (K4BiI7) into electrolyte. The K4BiI7-added electrolyte enables Li metal anode to display a stable cycling for over 600 cycles at 1.0 mA cm−2/1.0 mAh cm−2 and over 400 cycles at 5.0 mA cm−2/5.0 mAh cm−2. In situ optical microscopy observations also conform the suppression of Li dendrites at high current density. Moreover, the in-situ SEI layer modified Li anode exhibits an average Coulombic efficiency of 99.57% and less Li dendrite growth. The Li-S full sells with the modified electrolyte also show improved electrochemical performance. This research provides a cost-efficient method to achieve a highly ionic conductive and stable SEI layer toward advanced Li metal anodes.
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Xingguo Zhong,Yaqing Wei,Yanpeng Guo,Can Cui,Tianyou Zhai,Huiqiao Li
Blending two materials together to improve electrode performance has been proven an effective and practical strategy in the battery industry. Herein, we fabricate a novel n-HC/GeP 5 composite that doubles the energy density over hard carbon (HC) without sacrificing cycle stability and rate performance. The GeP 5 , with high capacity (2289 mAh g −1 ), ultra-high conductivity (2.4*10 6 S m −1 ) and high initial coulombic efficiency (ICE > 90%), enables it serve as an effective additive to HC at a low weight percent. By introducing 20% wt GeP 5 by mass ratio into HC, the obtained n-HC/GeP 5 -20%wt composite improves the reversible capacity from 400 mAh g −1 to 898 mAh g −1 , and improves ICE from 74% to 85%. In addition, the rate capability of n-HC/GeP 5 , with 516 mAh g −1 and 64% retention comparing 1C–8C, is much better than that of pure HC (273 mAh g −1 , 54% retention). Consequently, when tested at 1C and 8C for 550 cycles, large reversible capacity of 575 mAh g −1 and 400 mAh g −1 respectively can still be obtained for this n-HC/GeP 5 -20% hybrid, revealing its great potential to be used in commercial battery products.
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DOI
高影响因子
危险品化学品经营许可证（带存储）