Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 39
·22684-22690
·
IF 12.732
Di Yu,Qian Zhang,Jie Liu,Ziyang Guo,Lei Wang
High-loading sulfur electrodes play a crucial role in the practical application of Li–S batteries. However, the poor mechanical stability and sluggish Li-ion conduction severely hinder the cycling stability and rate property of high-loading sulfur electrodes. PVDF binder has been widely used in Li–S batteries, while the coating process using PVDF binder requires toxic and expensive NMP solvent and the poor mechanical property of PVDF binder makes it incompetent as the binder for high-loading Li–S batteries. Herein, we use strong-affinity alginic acid (Alg) and high-wettability, high-modulus isosorbide (IS) to produce an environmentally friendly c-Alg-IS network binder via a condensation reaction for a high-loading sulfur electrode. As a result, a Li–S battery with a c-Alg-IS binder showed dramatically improved cycling stability and rate performance under high sulfur loading; especially, when the sulfur loading increases to 9.1 mg cm−2, the Li–S battery exhibits a stable cycling life of 60 cycles and high areal capacity of 7.2 mA h cm−2 at 2.4 mA cm−2. This work provides a simple and effective strategy to address the issues of poor cycling stability and rate property of high-loading Li–S batteries.
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Journal of Physical Chemistry C
·
2018
·
IF 4.484
Xiaolei Man,Pei Liang,Haibo Shu,Lin Zhang,Dan Wang,Dongliang Chao,Zugang Liu,Xiaoqing Du,Houzhao Wan,Hao Wang
Layered metal sulfides (LMSs) with larger interlayer spacing are suitable for Li+ intercalation/extraction and possess relatively higher theoretical specific capacity than commercial graphite. However, pure LMSs show inherent low conductivity and irreversible huge volume expansion in lithium uptakes. In this work, we introduce an interesting van der Waals heterojunction between two popular LMSs, i.e., MoS2/SnS2 van der Waals heterojunction grown on reduced graphene oxide (MoS2/SnS2-rGO), which is synthesized by a facile hydrothermal process. The MoS2/SnS2-rGO nanocomposite exhibits a remarkable interface synergistic effect due to the weak van der Waals interaction on their nanocrystalline, which leads to an enhanced energy storage performance compared with MoS2-rGO and SnS2-rGO. The MoS2/SnS2-rGO exhibits better cycling stability of 894 mAh g–1 at 200 mA g–1 after 55 cycles and excellent rate performance of 590 mAh g–1 at 1 A g–1 for LIBs. This work proposes that weaker van der Waals interactions between the LMS can induce much more layer space for Li+ in LIBs, which might be another way to improve the storage performance of LIBs.
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Journal of Energy Storage
·
2026
·
IF 10.7
Xu Zhang,Qifan Gu,Jiabao Bai,Guoting Long,Yana Liu,Yunfeng Zhu,Jiguang Zhang,Jun Wang,Rui Shi,Xiaohui Hu
VS 2 has attracted extensive attention as potential host material for Mg 2+ /Li + hybrid-ion batteries (MLHBs) because of its considerable capacity and large interlayer spacing. However, the relatively weak adsorption ability and huge volume variations lead to slow reaction kinetics and poor cycle lifespan, which greatly restricts their further application in MLHBs. Herein, we have proposed a synergistic engineering of morphology regulation and sulfur vacancy for the construction of hierarchical VS 2 microflower via two pivotal procedures, which is demonstrated as a high-energy density cathode for MLHBs. Specifically, such special microflower morphology with sufficient interspace and abundant sulfur vacancies can release the inner stress to maintain structural integrity, thus leading to enhanced cycling stability. Meanwhile, the synergistic effect of flower-like structure and abundant sulfur vacancies contributes to providing sufficient redox-active sites, facilitating charge transfer, improving Li + adsorption capacity, and accelerating ion diffusion, as verified by kinetic analysis and theoretical calculations. Consequently, the hierarchical VS 2 microflower exhibits a high reversible capacity of 488.8 mAh g −1 at 100 mA g −1 , an excellent energy density of 406.6 Wh kg −1 , and an ultralong cycling stability with a capacity retention of 72.8% at 4000 mA g −1 after 2000 cycles. Besides, surface-controlled capacitive contribution analysis coupled with in-situ electrochemical impedance spectra (EIS) measurements confirm the excellent reaction kinetics. Therefore, this work presents a synergistic engineering strategy that combines morphology regulation and vacancy introduction in the fabrication of VS 2 -based cathodes for advanced MLHBs.
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CARBOHYDRATE POLYMERS
·
2026
·
IF 13.2
Chaofan He,Ze Kang,Kai Kang,Jiayue Huo,Rui Zhao,Yong Guo,Jie Wei,Yuxia Chen,Chao Ma
Conductive hydrogels derived from natural biomass have attracted considerable attention owing to their excellent flexibility and electrochemical performance. However, simultaneously achieving high mechanical strength, high electrical conductivity, and multifunctional integration remains a notable challenge. Herein, we propose a facile strategy to obtain bamboo cellulose nanofiber (BF) as the reinforcing phase using hydrated multi-carboxylic acid deep eutectic solvent and construct a multifunctional polyacrylamide-lignin/LiCl-BF (PAM-LLi-BF) hydrogel through free radical polymerization reaction induced by LLi catalytic system. The PAM-LLi-BF hydrogel leverages the uniform dispersion and permeation of BF throughout its network, as well as the dual effects of the LLi system in promoting rapid hydrogel polymerization and enhancing conductivity, which exhibits satisfactory compressive performance (615.27 kPa), tensile properties (strain of 1260.67%), and fatigue resistance. In addition, it possesses excellent conductivity, adhesion, and antifreezing capabilities. Moreover, the fabricated hydrogel-based flexible sensor simultaneously serves as a strain sensor (GF = 3.89, working range of 0–500%) and a pressure sensor (response time of 231 ms, stable sensing after 1000 compression cycles). Combined with a deep-learning algorithm, the PAM-LLi-BF hydrogel is integrated into an intelligent seat cushion and successfully applied to monitor human sitting posture in real time (with an identification accuracy rate of 95.1%).
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PubMed
高影响因子
MOLECULES
·
2026
·Vol. 31
·期 13
·2397
·
IF 5.1
Hua Li,Zijun Huang,Yifei Hou,Qiyue Liu,Di Li,Wenyue Zhang,Yi Su,Zhide Wang,Zaifa Yang
Against the backdrop of energy conservation and environmental protection, developing more stable and efficient phosphors has become an urgent challenge. In this study, we have synthesized a series of Ca2.5Hf2.5Ga3O12:Eu3+(CHGO:Eu3+) red phosphors via a high-temperature solid-state method, which exhibit strong red emission at 610 nm under 394 nm excitation, corresponding to the5D0→7F2transition of Eu3+. To improve the lattice vacancies caused by charge imbalance when Eu3+is doped into the CHGO lattice to replace Ca2+, we introduce the charge compensator M+(M = Li, Na, K). The results of the emission spectrum show that the introduction of charge compensators can effectively improve the luminescence intensity. Among them, K+has the most significant effect on increasing the emission intensity of Eu3+, making the emission intensity of the phosphor more than twice that when there are no charge compensation ions. Additionally, the quantum efficiency and thermal stability of these phosphors are significantly improved compared to the CHGO:0.075Eu3+sample before substitution. At 423 K, the emission intensity of the CHGO:0.075Eu3+, 0.075K+sample still remains at 88.7% of that at 298 K. The color rendering index of the prepared white LED is 81.2, and its CIE chromaticity coordinates are (0.3212, 0.3065). This indicates that the prepared CHGO:0.075Eu3+, 0.075K+red phosphor has broad application prospects in solid-state lighting.
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JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Juan Yu,Jiale Fan,Hao Zhang,Jingsen Yue,Xinxin Tang,Zhiyuan Ma
To address the issues of poor cycling stability and unrealized theoretical capacity of layered molybdenum disulfide (MoS 2 ) as an anode material—caused by severe volume expansion during charge/discharge processes—we innovatively propose a "partial carbonization" modification strategy for ZIF-8 templates. This approach successfully constructs a ZnS/NC "dodecahedral nursery" rich in active sites. Benefiting from the abundant anchoring sites provided by this structure, MoS 2 can uniformly and firmly "take root" on the "nursery" via Mo–N bonds, ultimately forming a composite material (ZnS/NC@MoS 2 ) in which MoS 2 nanoflowers uniformly coat the dodecahedral framework. This composite effectively mitigates the volume expansion of MoS 2 and enhances overall structural stability. Moreover, the zinc retained by the partial carbonization strategy, after sulfidation, contributes additional capacity via conversion reactions, further enhancing the material's electrochemical performance. Specifically, when used as an anode for lithium-ion batteries (LIBs), it maintains a specific capacity of 895.64 mAh g −1 after 1200 cycles at 2 A g −1 ; for sodium-ion batteries (SIBs), its specific capacity increases from 348 mAh g −1 to 510 mAh g −1 after 500 cycles at 1 A g −1 .
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Xiaobo Ma,Weibin Li
A new approach is proposed for in-situ growth of carbon nanotubes on the surface of ZIF-8 particles. • The double-layer carbon encasing effectively suppresses the volume expansion of silicon nanoparticles. • The silicon carbon composite exhibits excellent cycling performance for lithium-ion battery anodes. • Abundant CNT-containing carbon framework boosts conductivity and lithium ion diffusion kinetics. Silicon-based materials as anode materials for lithium-ion batteries, face critical challenges including significant volume expansion during charge/discharge cycles and low electronic conductivity. Carbon-coated silicon particles represent a promising approach, and their cycling stability falls short of the need in practical applications. Here, a novel method to in-situ synthesize dual-layered carbon-coated silicon nanoparticles rich in carbon nanotubes has been reported as an anode material for lithium-ion batteries. It exhibits outstanding lithium storage performance, maintaining a discharge capacity of 1007.1 mAh g −1 after 1000 charge/discharge cycles at current density of 0.5 A g −1 , demonstrating a capacity retention rate of 99.9%, while maintaining a low volumetric expansion rate of only 40% after 1000 cycles as compared to the value of 155% for the bare Si electrode investigated by the top-view digital photographs and cross-sectional SEM image. Even at 1 A g −1 high current density, the composite maintains a high reversible capacity of 705.4 mAh g −1 with 92.1% capacity retention rate after 1000 charge/discharge cycles. It is found that the better electric performance above is closely related with the carbon nanotubes outside the unique dual-layered carbon-coated silicon nanoparticles, which significantly enhances the electrode electrical conductivity and lithium-ion diffusion coefficient (≈10 −10 cm 2 s −1 ). This work provides a valuable technical route to develop silicon-based anode materials with high electrical conductivity and reactivity. Download: Download high-res image (143KB) Download: Download full-size image
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Advanced Science
·
2026
·
IF 14.1
Ruihua Li,Haiwei Wu,Hairu Wei,Wenhao Jia,Frederik Bettels,Leon Schenk,Zhihua Lin,Hanbin Liu,Guodong Liu,Zhijian Li,Lin Zhang
Lithium–sulfur (Li–S) batteries face low sulfur utilization and limited rate capability. Although electrolyte engineering is a key strategy for improving the conversion kinetics of lithium polysulfides (LiPS), achieving a balance between high energy density and high power density remains challenging. This study combines an ultra-low concentration electrolyte with a dual-functional hybrid organic selenium/organic tellurium additive (DPDSe/DPDTe). The system exhibits higher ionic conductivity and enhanced LiPS conversion kinetics. This is attributed to the high solubility of LiPS at low concentrations, which enhances the accessibility of active materials. By adjusting the mixing ratio of DPDSe/DPDTe, the formed DPDSe-Te exhibits unique solvation structure regulation and synergistic catalytic effects. This Li–S battery delivers an initial specific capacity of 1103 mAh g −1 (65.9% sulfur utilization) at 0.5 C and retains 89.3% of its capacity after 100 cycles. Even at 2 C, a capacity of 783 mAh g −1 is achieved. The pouch cell exhibits a high energy density of 340 Wh kg −1 at 0.5 C with stable cycling. This low-concentration, dual-functional additive strategy synergistically addresses LiPS solubility limitations and kinetic bottlenecks, offering an effective route toward Li–S batteries with both high energy density and high-power density.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Yuxin Gong,Mengyu Fu,Yingmin Jin,Yumeng Li,Ruifan Lin,Yong Zhang,Lei Lei,Ying Zhang,Changsong Dai,Yueping Xiong
Halide solid-state electrolytes (HSSEs), exemplified by low-cost Li 2 ZrCl 6 , exhibit high ionic conductivity and a wide electrochemical stability window, making them promising for all-solid-state batteries (ASSBs). Yet, optimizing HSSEs by elemental doping is either inefficient or costly, necessitating alternative approaches. Inspired by the filler-modified LiI-Al 2 O 3 system with fast-conductive interfacial percolation layer (IPL) and with regard to the underlying insufficient interfacial filler/electrolyte contact with Li 2 ZrCl 6 matrix, which hinders the IPL formation, the use of transition metal oxide Fe 2 O 3 is pioneered as a filler to generate oxygen vacancies and foster benign filler/electrolyte interfaces. At the Fe 2 O 3 /electrolyte interface, synchrotron X-ray adsorption spectra and electron energy loss spectra mapping reveal a distinctive O-Cl exchange reaction and improved interfacial contact. Density function theory, bond-valence site energy calculations, and finite-element simulations validate improved Li + migration via mitigated electrostatic confinement, reduced migration energy barriers, and spatially confined electric-field-accelerated IPLs. Benefiting from these merits, the ionic conductivity of the composite electrolyte surges from 0.4 to 2.15 mS cm −1 , with Li + migration activation energy reduced to 0.28 eV. Paired with the NCM811 cathode, the ASSB delivers 90% capacity retention over 1000 cycles at 0.5 C. This work offers a novel, cost-effective strategy for high-performance halide-oxide composite electrolytes from the counterintuitive perspective of nanofiller integration.
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ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Hui Wang,Minyao Liu,Guangzhao Zhang,Yukun Chen,Yonggang Min,Jin Li
The propagation of lithium dendrites and the “shuttle effect” of polysulfide represent two critical challenges hindering the practical application of lithium sulfur batteries (LSBs). Herein, a dual-functional integrated Janus separator is proposed, which simultaneously inhibits the shuttle effect of polysulfide and lithium dendrites to enhance the electrochemical performance of LSBs. On the lithium metal anode interface, directional denaturation treatment was first applied to increase the α-helix content in soy protein isolate (SPI), yielding α-SPI with enhanced Li+ affinity. Phytic acid (PA) served simultaneously as cross-linker and acidity regulator, anchoring α-SPI nanoparticle onto carboxylated cellulose nanofibers (C–CNF). The resulting composite was uniformly sprayed onto the separator to construct a lithiophilic α-SPI@C–CNF framework, which homogenizes Li+ flux and suppresses lithium dendrite. At the cathode interface, the made-to-measure three-dimensional carbon (M-3DC) physically entraps lithium polysulfides and thus prevent the shuttle effect. Finally, the LSB using the Janus separator delivers a high initial capacity of 938 mAh g–1 and exhibits an excellent operation stability by retaining 537.8 mAh g–1 after 1000 cycles (with a capacity degradation rate of only 0.043% per cycle). This study presents a versatile approach to simultaneously mitigate the intrinsic limitations of both the lithium metal anode and the sulfur cathode in LSBs.
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GREEN CHEMISTRY
·
2025
·
IF 9.2
Fengyin Zhou,Beilei Zhang,Hongya Wang,Danfeng Wang,Xin Qu,Shiyu Wang,Mengyi Tang,Ling Peng,Xiang Chen,Dihua Wang,Lawrence Yoon Suk Lee,Huayi Yin
Pyrolysis, thermal reduction, and mechanochemical force are commonly used for biomass utilization, materials synthesis, and spent Li-ion batteries recycling. However, the effect of mechanical treatment on pyrolysis gas generation and thermal reduction remains unclear. Herein, we study the effect of mechanical treatment on the biomass pyrolysis reduction of LiCoO2. The mechanical milling generates oxygen vacancies in the LiCoO2 lattice. In addition, the mechanical treatment can regulate the pyrolysis gas of sawdust in terms of increasing the content of H2, CH4, and CO while decreasing the CO2 content. The oxygen vacancies and pyrolysis gas are beneficial for the thermal collapse of the LiCoO2 structure, leading to the rapid and complete separation of Li and Co, thereby increasing the recovery efficiency to above 98%. The understanding of the interplay of mechanical force, oxide structure, and pyrolysis gas composition helps design green approaches to enabling metal and organic resource recovery and utilization.
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Batteries-Basel
·
2023
·Vol. 9
·期 5
·
IF 4
Ningning Feng,Chaoqiang Wang,Jing Wang,Yang Lin,Gang Yang
Lithium–oxygen (Li-O2) batteries have captured worldwide attention owing to their highest theoretical specific energy density. However, this promising system still suffers from huge discharge/charge overpotentials and poor cycling stability, which are related to the leakage/volatilization of organic liquid electrolytes and the inefficiency of solid catalysts. A mixing ionic liquid-based gel polymer electrolyte (IL-GPE)-based Li-O2battery, consisting of a 20 mM 2,5-di-tert-butyl-1,4-benzoquinone (DBBQ) 40 mM N-methylphenothiazine (MPT)-containing IL-GPE and a single-walled carbon nanotube cathode, is designed for the first time here. This unique dual redox mediators-based GPE, which contains a polymer matrix immersed with mixed ionic liquid electrolyte, provides a proper ionic conductivity (0.48 mS cm−1) and effective protection for lithium anode. In addition, DBBQ, as the catalyst for an oxygen reduction reaction, can support the growth of discharge products through the solution–phase pathway. Simultaneously, MPT, as the catalyst for an oxygen evolution reaction, can decompose Li2O2at low charge overpotentials. Hence, the DBBQ-MPT-IL-GPE-based Li-O2battery can operate for 100 cycles with lower charge/discharge overpotentials. This investigation may offer a promising method to realize high-efficiency Li-O2/air batteries.
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