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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高影响因子
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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高影响因子
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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ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Shilun Gao,Dandan Yang,Yiyang Pan,Liyuan Geng,Shaoqi Li,Xiaohua Li,Peng-Fei Cao,Huabin Yang
As one of the highest specific capacity anode materials in lithium-ion batteries, the main technical issue for silicon (Si) based electrodes is the rapid capacity fading caused by the huge volume changes. Porous Si materials are reported to efficiently alleviate the side effects of volume fluctuation. However, the expensive precursor and complicated production process in previous reports limited their practical applications. Herein, we report a cost-efficient approach on the fabrication of porous Si via the low temperature aluminothermic reduction of low cost natural raw materials, combining the advantages of low temperature and natural materials. The porous structure of attapulgite-derived Si (Si ATP ) is well retained during the compositing process. The obtained composite electrode Si ATP /graphite@carbon (Si ATP /G@C) exhibits excellent electrochemical performance, with a reversible discharge capacity of 799 mAh g −1 after 100 cycles. To demonstrate the versatility of the approach, another natural ore, mica (MIC), was also utilized to the fabrication of porous Si (Si MIC ). As expected, the Si MIC /graphite@carbon composite electrode also exhibits high specific capacity (697 mAh g −1 after 100 cycles), superior capacity retention (81% after 100 cycles based the 4th cycle), and outstanding rate capability.
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Journal of Materials Research and Technology-JMR&T
·
2022
·
IF 6.267
Yuancai Xu,Guangyu Li,Wenming Jiang,Junmin Zhan,Yang Yu,Zitian Fan
Generally, sand casted Al–Li alloy castings have very serious problems in pore defect and interfacial reaction, remarkably weakening the Al–Li alloy castings quality. How to solve these problems is always a challenge. In this paper, a novel inorganic binder coating containing lithium silicate solution binder and silicon carbide powder on the surface of the sand mold was developed to eliminate pore defect and prevent interfacial reaction of the sand casted Al–Li alloy castings. The effective mechanism of the inorganic binder coating on the pore defect and interfacial reaction was discussed. The obtained results showed that the inorganic binder coating formed a thin shell on the surface of the sand mold after pouring, which can effectively prevent the metal-mold interface reaction of the sand casting Al–Li alloy and significantly reduce the porosity defects. Among them, the Al–Li alloy casting prepared using the inorganic binder coating consisting of the lithium silicate binder and silicon carbide powder basically had no pore defects, and the porosity was only 3.73%, which was 66.7% lower than that of the casting prepared by the sand mold without any treatment. Moreover, the interface reaction of the Al–Li alloy and sand mold was fully eliminated, which was attributed to the low overall atomic diffusion rate of the silicon carbide based on molecular dynamics simulation results.
研究领域:
材料科学
·
金属铸造技术
·
表面工程
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Journal of Environmental Chemical Engineering
·
2026
·
IF 7.2
Na Wang,Jieyu Zhao,Hankun Zhang,Tianlei Wang,Jixue Shen,Qian Kang,Longfeng Tao,Xi Yue,Chuncheng Yang,Hongchao Li,Changjiang Liu
The growing demand for lithium batteries promotes the generation of a large amount of spodumene leached residue (SLR) in the lithium extraction industry, which leads to potential environmental challenges. To seek a proper treatment strategy for SLR, its ion-exchange behaviors were investigated systematically in solutions containing Li + , Na + , K + , Ca 2+ , and Mg 2+ . The results indicated that the SLR exhibited a pronounced positive selective response toward Li + , resulting in a Li 2 O content of 0.74%-1.86% after ion-exchange in the mixed-cation system. Moreover, a proper adjustment of solution alkalinity can further enhance H + /Li + ion-exchange, significantly improving the exchange efficiency to a maximum Li 2 O content of 8.44%. Repeated experiments as well as industrial SLR indicated good re-utilization potential. The present work provides a novel pathway for the resource utilization of SLR and offers a feasible new approach for lithium recovery from complex ion systems.
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高影响因子
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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PHYSICAL REVIEW B
·
2019
·Vol. 100
·期 17
·174519
·
IF 3.736
B. Lei,L. K. Ma,N. Z. Wang,C. S. Zhu,J. H. Cui,Z. L. Sun,D. H. Ma,H. H. Wang,M. Z. Shi,J. J. Ying,X. H. Chen
Manipulating collectively ordered electronic and magnetic states in a correlated system is at the core of condensed matter physics. Besides tuning the carrier density of a crystal, the latest developed field-effect transistor (FET) with a solid ion conductor (SIC) can also drive ions into the crystal and lead to structural transformations that are difficult to access with conventional methods including conventional field-effect transistors. Here, we exploit the SIC-FET gating technique to realize a metastable phase in (Li,Fe)OHFeS thin flakes, and achieve a rich phase diagram involving superconductivity, soft ferromagnetism, and hard ferromagnetism. With the injection of Li ions into the thin flake, the superconductivity is gradually suppressed and a soft ferromagnetic phase with new crystal structure sets in, evidenced by the anomalous Hall effect and magnetoresistance measurements. Further injecting Li ion drives the soft ferromagnetic state into a hard ferromagnetic state, where different types of magnetic interactions dominate due to the simultaneous tuning of carrier density and magnetic Fe ion concentration in the Li ion injection process. Our paper paves a way to control structural phase transformations as well as physical properties by the electric field. These findings demonstrate the superior performance of the SIC-FET in regulating the physical properties of layered crystals and its potential applications for multifunctional devices.
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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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ACS Applied Materials & Interfaces
·
2026
·Vol. 18
·期 32
·43897-43906
·
IF 7.8
Li Ling-Yun,Zhu Zhi-Jie,Shen Ming-Yuan,Wu Tao,Li Wen-Cui
Mn-rich P2-type oxides offer high capacity via Mn redox, yet their commercial viability is stalled by Jahn−Teller distortions and structural instability. To overcome these hurdles, a pillaring strategy is employed to anchor the layered framework, effectively suppressing lattice strain and ensuring long-term cycling stability. Here, we regulate the coordination chemistry of a multielement co-doped P2 framework by coupling Ca/Mg/Ni/Ti substitution with controlled Li + occupation in the Na layer and systematically tune the composition as Na 0.8 Li 0.2 Ca 0.025 Mg 0.05 Ni 0.1 Mn 0.75 Ti 0.05 O 2 (NMNMT-20Li). The optimized NMNMT-20Li activates the reversible anionic redox above 4.0 V and delivers the highest reversible capacity of 120 mAh g −1 . In situ XRD evidences a solid-solution-like evolution without a phase transition and an ultra-low unit-cell volume change of ∼0.9% within 2.0−4.3 V. In situ distribution of relaxation times (DRT) reveals highly reversible charge-transfer and cathode−electrolyte interphase resistances. Density functional theory (DFT) calculation identifies interlayer Li as a “pillar” that smooths electrostatic potential between layers and lowers Na + migration barriers, while excessive Li induces transport blocking. Furthermore, the NMNMT-20Li || HC full cell exhibits a high initial energy density of 241.3 Wh kg −1 and retains 97.71% capacity after 200 cycles, demonstrating its strong practical promise.
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高影响因子
Journal of Energy Storage
·
2026
·
IF 10.7
Ying Xu,Xiu Liu,Ling Chen,Guojing Zang,Jinhao Xie,Zhongxin Liang,Yuxin Luo,Xiangyu Sun,Zishou Zhang
Designing advanced polymer binders offers an effective route to mitigate the severe volume expansion of high-energy-density micron silicon (SiMP) anodes for practical applications. However, most existing binder studies prioritize mechanical robustness while overlooking ionic conductivity, which is equally critical for electrochemical performance. Here, we report a multifunctional polymer binder formed by a synthesized polyurethane-based polymer, polyphenol polyurethane (PUTA) and polyacrylic acid (PAA), aiming to achieve a synergistic balance between high ionic conductivity and mechanical integrity. PUTA integrates poly tetramethylene ether glycol (PTMEG) soft segments for simultaneous Li + transport facilitation and elastic stress relief, while tannic acid (TA) is introduced to serve as a branched, rigid anchoring center within the hard segment to provide abundant phenolic hydroxyl groups for forming a dynamically reversible, physically cross-linked hydrogen-bonded network upon blending with PAA, simultaneously ensuring structural robustness, uniform stress distribution, and self-healing of microcracks during cycling. As a result, the Si anodes enable over 90% capacity retention across a broad current density spectrum, from 0.5C to 4C. The augmented PTMEG segment, which leads to superior Li + diffusion in dynamics tests surging to 9.44 × 10 −10 cm 2 s −1 , has certified its ability of Li + transportation. Moreover, the full battery with LFP loading at 13.05 mg cm −2 as cathode and SiC1800 as anode also boasts impressive long-term cycling stability.
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