ACS Applied Energy Materials
·
2025
·
IF 5.5
Jintao Du,Haihua Luo,Qing Zhang,Chao Wang,Wei Chen,Shufen Wu,Xinyuan Yin,Jingjing Fu,Heng Cao,Xiaosong Liu,Wenhua Zhang
The strong coupling between Li+ transport and polymer segmental motion is considered to inherently limit the low-temperature performance of all-solid-state polymer electrolytes (ASPEs). Breaking the symmetric coordination environment of Li+ to promote its hopping transport mechanism offers a promising strategy to address this issue. In this work, we incorporate ∼60 wt % succinonitrile (SN) into a polypropylene (PP)-reinforced poly(ethylene oxide) (PEO)–(lithium bis(trifluoromethanesulfonyl)imide) LiTFSI (PPLS) electrolyte to disrupt the Li+ coordination symmetry. Multiple spectroscopies and theoretical calculations reveal that SN competitively coordinates with Li+ against PEO chains, resulting in an asymmetric and weakened Li+ solvation structure. Electrochemical impedance spectroscopy (EIS) and distribution of relaxation times (DRT) analyses demonstrate the decoupled dynamics of the Li+ transport from segmental relaxation. The PPLS electrolyte achieves a high ionic conductivity of (5.98 ± 0.585) × 10–5 S/cm at 0 °C and stable Li plating/stripping for >700 h at 0.1 mA/cm2 (25 °C). All-solid-state lithium batteries exhibit exceptional cycling performance at both room temperature and 0 °C. This work reveals the plasticizer-mediated formation of asymmetric Li+ coordination structures and their critical role in decoupling Li+ transport, offering a design paradigm for ASPEs that synergistically enhances ionic conductivity, mechanical robustness, and low-temperature adaptability.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Zhihao Shi,Bingjue Wang,Ziwei Zhang,Han Chen,Yujie Shi,Yulei Sui,Ling Wu
Transition metal carbides/nitrides (MXene) emerge as promising enhancers for high-capacity metal sulfide anodes, owing to exceptional electrical conductivity, mechanical robustness and adaptable surface chemistry. Here, MXene/SnS 2 heterostructures with a honeycomb architecture are fabricated by a mild liquid-phase deposition method. Density functional theory calculations reveal that the negatively charged MXene terminal groups govern the Sn 4+ cation adsorption, thereby promoting nucleation. By optimizing component dispersion and interfacial bonding, the composite effectively combines the high capacity of SnS 2 with the conductive MXene framework, achieving initial discharge capacities of 1547.0 and 555.3 mAh g −1 at the current densities of 0.1 and 5 A g −1 , respectively. After 1000 cycles, it retains a capacity retention of 69.5 % at 5 A g −1 . The hierarchically structured interface enhances ion transport and pseudocapacitive effects, enabling fast rate performance. The approach provides an idea for designing fast-charging anodes with high energy density.
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yunsong Ran,Tong Liu,Shangyan Zhou,Chunliang Yang,Xiaodan Wang,Dong Zou,Jiling Song,Hao Wen,Yuandong Zheng,Fei Liu
The growing demand for advanced energy storage technologies has accelerated significant advances in solid-state lithium metal batteries (SSLMBs). Among which, Li 1+X Al X Ti 2-X (PO 4 ) 3 (LATP) solid-state electrolyte has attracted much attention due to its competitive room-temperature (RT, 25 °C) Li + conductivity, air stability and economics. In this study, a composite electrolyte consisting of uniformly eLATP nanosheets embedded in a PVDF/LiTFSI matrix has address the limitations of ionic conductivity and interfacial stability in quasi-solid-state lithium metal batteries (QSSLMBs). Significantly, the eLATP nanosheets are uniformly distributed in the PVDF/eLATP composite, which greatly improves the ionic transport capacity and mechanical strength. Simultaneously, such uniform distribution ensures uniform current density and stress distribution, which effectively inhibits the growth of lithium dendrites. As expected, the Li/PVDF/eLATP/Li symmetric cells achieve an outstanding long-term lifespan of 6500 h at 0.1 mA cm −2 , with 1000 h of efficient operation even at 0.5 mA cm −2 at RT. In addition, full cells paired with the LFP cathodes achieve 91.08 % capacity retention after 1000 cycles at 1C, with an ultralow average decay rate of 0.00036 % per cycle at 5C(RT). Furthermore, the Li||NCM cells demonstrate exceptional cycling stability under 2C conditions at 25 °C. Overall, a novel composite solid-state electrolyte with excellent electrochemical properties has been engineered.
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DOI
PubMed
高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Wenyu Shen,Yang Li,Shaoyang Gao,Yuhe Tian,Ziyun Zhang,Junbo Xu,Duo Wang,Chao Yang
Synergetic extraction system has been extensively applied in Li extraction to alleviate the increasingly severe shortage of lithium production. However, the underlying coordination mechanisms still remain unclear. Herein, a synergistic extraction system of sodium tetraphenylborate (NaBPh 4 ) and tributyl phosphate (TBP) was employed for Li + /Mg 2+ separation. With increasing TBP content in the organic phase, Li + extraction efficiency gradually rose from 88.64% to 92.20%. By contrast, Mg 2+ extraction efficiency presented an abnormal trend, which was an initial decrease followed by a gradual increase. High-resolution electrospray ionization mass spectrometry together with quantum chemical calculations revealed that Mg 2+ mainly formed Mg(BPh 4 ) 2 at the low TBP content whereas the formed complex gradually transitioned to [Mg · 4TBP](BPh 4 ) 2 with increasing TBP content, leading to the initial decline in Mg 2+ extraction efficiency. Our work provides valuable insights into the mechanisms underlying Li + /Mg 2+ separation in the TBP system and offers a promising approach for broader applications.
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Junying Yin,Xin Xu,Sen Jiang,Yue Lei,Yunfang Gao
Solid-state lithium metal batteries (SSLMBs) with high safety and high energy densities draw widespread attention in recent years. Nevertheless, the intrinsic defects of the solid-state electrolyte (SSE) such as the poor compatibility with electrodes and low ionic conductivity hamper the application of SSMLBs. Herein, we introduce rigid two-dimensional hexagonal boron nitride (BN) nanosheets and flexible One-dimensional aramid nanofibers (ANFs) as bi-nanofillers into the polyethylene oxide (PEO)-based SSEs to fabricate a composite solid-state electrolyte (CSE) ANF-PEO-BN with network structure boosting the comprehensive performance of SSMLBs. ANF and BN with special properties and structures are prone to be dispersed homogeneously in the PEO matrix to build the ANF-PEO-BN electrolyte, whose rigid and flexible network structure ensures the formation of Li dendrites inhibited. Furthermore, the dissociation of lithium bis(trifluoromethanesulphonyl)imide (LiTFSI) is promoted and more ion transport channels are provided due to the strong affinity between Lewis acid centers of ANF/BN and Li + /TFSI − . As a result, the LiFePO 4 /Li batteries deliver high-capacity retention of 86% after 500 cycles and Li/Li cells stably cycle beyond 3300 h with small overpotential of 10 mV at 0.1 mA cm −2 /0.2 mAh cm −2 .
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高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Jingpeng Wang,Chunyu Du,Xing Xu,Xiaoshu He,Geping Yin,Yulin Ma,Pengjian Zuo,Xinqun Cheng,Yunzhi Gao
A facile high-temperature solid phase approach is employed to coat lithium phosphorus oxynitride (LiPON) layer on the concentration gradient Li[Ni 0.73 Co 0.12 Mn 0.15 ]O 2 material with Ni-rich core and Ni-poor surface. X-ray diffraction, scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy demonstrate that LiPON forms an even coating with ∼4 nm of thickness on the surface without destroying the bulk structure of Li[Ni 0.73 Co 0.12 Mn 0.15 ]O 2 material. The LiPON-coated concentration gradient Li[Ni 0.73 Co 0.12 Mn 0.15 ]O 2 material exhibits a capacity retention of 87.3% at 25 °C after 1000 cycles and 89.9% at 55 °C after 250 cycles, which is 36.1% and 17.2% higher than that of pristine Li[Ni 0.73 Co 0.12 Mn 0.15 ]O 2 material, respectively, under the same operating conditions. This significantly improved cycling performance is ascribed to the noncrystalline LiPON layer on the surface, which provides a reliable interface protection. The LiPON coating is an effective approach to enhancing the electrochemical performance of electrode materials for lithium ion batteries.
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高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xiaoqing Liu,Guangshe Li,Jinjiang Wu,Dan Zhang,Liping Li
Vanadium monoxide (VO) is a promising candidate as an anode for lithium-ion batteries due to its high theoretical capacity, low cost, and considerable electronic conductivity. Unfortunately, a large volume change during electrochemical processes obstructs its practical application. In this work, a composite of VO nanorings grown on a porous carbon architecture is prepared via a topochemical self-reduction approach. When used as an anode for lithium-ion batteries, improved redox kinetics from enhanced electronic conduction and the corresponding fast lithium-ion diffusion is observed to greatly promote the electrochemical performance of lithium-ion batteries. The resulting composite delivered a reversible capacity of 336 mA h g–1 after 400 cycles at 10 A g–1 with a capacity retention of 85%, owing to the synergistic effect of VO nanorings and porous carbon in alleviating volume changes that result in a long-term cycling ability at a high current density. At 20 A g–1, the composite anode exhibited a rate capability of 235 mA h g–1, superior to all VO-based electrodes reported in the literature. Furthermore, a full cell was first fabricated by employing VO@C-2 as the anode and LiFePO4 as the cathode, which exhibited a capacity of 213 mA h g–1 after 100 cycles at 0.1 A g–1, indicating the potential of VO as an anode for practical application.
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高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2022
·Vol. 38
·期 5
·1232-1238
·
IF 2.726
Chen Weijie,Xia Huicong,Guo Kai,Jin Wangzhe,Du Yu,Yan Wenfu,Qu Gan,Zhang Jianan
Lithium-sulfur(Li-S) batteries have been puzzled by the “shuttle effect”. In the recent years, catalytic materials present a huge potential for solving this problem. However, the exploitation for catalytic activity was still challenging in Li-S batteries. In this article, we put forward a single atom catalyst (SAC) of FeN 4 coupled with Fe 3 C on the N-doped carbon (FeN 4 /Fe 3 C@NC) by one-step pyrolysis method. The FeN 4 and Fe 3 C synergistically catalyze the polysulfides conversion when the N-doped carbon provides the high conductive three-dimensional skeleton in Li-S batteries. As a result, the FeN 4 /Fe 3 C@NC shows a specific capacity of 1100 mA·h/g at 0.2 C(1 C=1675 mA/g). In addition, the FeN 4 /Fe 3 C@NC maintains 99.01% of the pristine specific capacity after 100 cycles at 0.5 C, indicating the improved electrochemical performance in Li-S batteries. This work sheds new lights on the design of engineering catalysts for developing high-performance Li-S batteries.
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高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 14
·5862-5869
·
IF 9.931
Ming Li,Chao Wang,Lixiao Miao,Jingwei Xiang,Tanyuan Wang,Kai Yuan,Jitao Chen,Yunhui Huang
Lithium–sulfur (Li–S) batteries are promising for the next-generation energy storage devices due to their high theoretical energy density and low cost. However, the shuttle effect and the passive layer between the separator and electrode still affect the cycling stability and coulombic efficiency seriously. Herein, we develop a 10 μm-thick rGO (reduced graphene oxide) and molybdenum phosphide (MoP) composite coating layer on a Celgard separator to improve the electrochemical performance of Li–S batteries. The introduction of such a MoP/rGO coating layer on the separator not only impedes the diffusion of polysulfides to the anode but also improves the sulfur utilization. In particular, the 10 nm MoP nanoparticles are very efficient for the polysulfide adsorption. Compared to the pristine Celgard separator, superior electrochemical performance is obtained in both coin cells and pouch cells with the MoP/rGO coated separator. High areal capacity (∼3 mA h cm−2), good rate performance, and long cycle life (300 cycles) are attained under a sulfur loading of 3.88 mg cm−2. The capacity decay rate is as low as 0.045% per cycle over 300 cycles. In addition, the pouch cells made by the modified separator with a high sulfur loading of 4.6 mg cm−2 achieve good electrochemical performance. At 0.1C, the initial discharge capacity is 1083 mA h g−1, and still remains at 759 mA h g−1 after 120 cycles. The result reveals the potential practical use of this MoP/rGO coated separator for Li–S batteries.
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高影响因子
RSC Advances
·
2017
·Vol. 7
·期 39
·24305-24311
·
IF 3.108
Keli Zhang,Yonggao Xia,Zhengdong Yang,Rusheng Fu,Chengxu Shen,Zhaoping Liu
Three dimensional (3D) porous silicon/reduced graphene oxide (Si/rGO) composites with typical networks have suffered damage during electrode preparation, which evidently affects the cycle and rate capabilities of Si/rGO anodes. Here, a controllable evaporation dry method is proposed to fabricate structure-preserved 3D porous Si/rGO anode materials by tuning the pore size distribution of the networks. As a result, after evaporation drying for 3.5 h, the optimal sample of 3D porous Si/rGO anode (denoted as Si–G-3.5) with a pore size of ∼500 nm could preserve its 3D network during the electrode preparation process. While the structures of Si/rGO composites with different drying times (denoted as Si–G-0, Si–G-2.5 and Si–G-4) failed to be preserved. Consequently, The Si–G-3.5 anode exhibits a high reversible specific capacity of 1563 mA h g−1 at 50 mA g−1, 90% capacity retention after 100 cycles and superior rate capability (955 mA h g−1 at 2 A g−1).
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高影响因子
Journal of the American Chemical Society
·
2023
·
IF 15
Guodong Chen,Wenda Li,Xiaofan Du,Chen Wang,Xuelian Qu,Xiangyu Gao,Shanmu Dong,Guanglei Cui,Liquan Chen
Li-SOCl2 batteries possess ultrahigh energy densities and superior safety features at a wide range of operating temperatures. However, the Li-SOCl2 battery system suffers from poor reversibility due to the sluggish kinetics of SOCl2 reduction during discharging and the oxidation of the insulating discharge products during charging. To achieve a high-power rechargeable Li-SOCl2 battery, herein we introduce the molecular catalyst I2 into the electrolyte to tailor the charging and discharging reaction pathways. The as-assembled rechargeable cell exhibits superior power density, sustaining an ultrahigh current density of 100 mA cm–2 during discharging and delivering a reversible capacity of 1 mAh cm–2 for 200 cycles at a current density of 2 mA cm–2 and 6 mAh cm–2 for 50 cycles at a current density of 5 mA cm–2. Our results reveal the molecular catalyst-mediated reaction mechanisms that fundamentally alter the rate-determining steps of discharging and charging in Li-SOCl2 batteries and highlight the viability of transforming a primary high-energy battery into a high-power rechargeable system, which has great potential to meet the ever-increasing demand of energy-storage systems.
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高影响因子
IONICS
·
2023
·Vol. 30
·期 2
·697-708
·
IF 2.8
Wang Guanzheng,Lei Huazhi,Wang Zheng,Yuan Zhentao,Zhan Zhaolin,Li Lu,Wang Xiao
Amorphous GeO 2 @C anode materials were successfully prepared from commercial GeO 2 and C 6 H 12 O 6 .H 2 O by a hydrothermal method combined with sintering under nitrogen atmosphere protection. The anode materials showed an ideal spherical shape of about 3 μm and their surface was uniformly covered with C. GeO 2 @C composite anodes exhibited better storage performance for Li-ion batteries. The discharge-specific capacities of GeO 2 @C-3 sample were 1143, 1049, 776, 551, and 308 mAh g -1 at current densities of 0.2, 0.5, 1, 2, and 5 A g -1 , and restored to 1136 mAh g -1 when the current density returned to 0.2 A g -1 . The reversible specific capacity was 756 mAhg -1 after 1000 cycles at a current density of 1 A g -1 . The GeO 2 @C anode was stable in the process of charge and discharge, and no obvious pulverization occurred. GeO 2 @C composites stabilized the electrochemical properties through carbon and amorphous structure to improve the overall electrical conductivity in Li + embedding/de-embedding processes.
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高影响因子
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