Journal of Materials Chemistry A
·
2013
·Vol. 1
·期 16
·5031-5036
·
IF 0
Chu Liang,Yongfeng Liu,Mingxia Gao,Hongge Pan
In this paper, we report a KOH-doped Mg(NH2)2–2LiH system with low operating temperatures and good cycling stability. The Mg(NH2)2–2LiH–0.07KOH sample can reversibly desorb/absorb ∼4.92 wt% hydrogen with a starting and peak dehydrogenation temperature of ∼75 °C and ∼120 °C, respectively, the lowest in the current Mg(NH2)2–2LiH system studied. Moreover, the cycling stability of de-/hydrogenation is also remarkably improved by KOH doping as the average capacity degradation of the Mg(NH2)2–2LiH–0.07KOH system is of only 0.002 wt% per cycle within 30 cycles. Detailed structural investigations reveal that during ball milling, the doped KOH can react with Mg(NH2)2 and LiH to convert to MgO, KH and Li2K(NH2)3, which work together to provide the synergistic effects of thermodynamics and kinetics on hydrogen desorption and absorption of the Mg(NH2)2–2LiH system upon heating, consequently inducing a significant improvement in hydrogen storage properties.
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Regenerative Biomaterials
·
2025
·
IF 8.1
Zhang Ting,Yu Yameng,Yuan Wei,Ren Zeqi,Cheng Yan,Wu Shuilin,Zheng Yufeng,Xia Dandan
Biodegradable Zn alloy have recently gained considerable attention for use in bone implants considering their biodegradability, attractive mechanical properties, and bioactivity. However, excessive corrosion of Zn alloy at the early stage of implantation may cause severe cytotoxicity, resulting in insufficient osseointegration, which hinders the clinical use of the Zn alloy. In this study, we designed a photothermal-controlled degradative hybrid coating as corrosion-protective barrier with the intention of preventing Zn ion burst release during the early stages of implantation and regaining the alloy's corrosion advantage later on. The coating consisting of Zeolite imidazole skeleton-encapsulated indocyanine green core-shell structured nanoparticles and polylactic coglycolic acid (ICG@ZIF-8/PLGA) on pristine Zn-0.8 (wt.%) Li (ZL) alloy. The electrochemical test results indicated that coating ZL with ICG@ZIF-8/PLGA might effectively reduce its corrosion current density (icorr) from 2.48 × 1 0 −5 A•cm−2 to 2.10 × 1 0 −8 A•cm−2. After near-infrared light irradiation, ICG@ZIF-8 heated PLGA coating to reach Tg, so that the coating was degrading, and the icorr of coated ZL alloy decreased to 2.50 × 1 0 −7 A•cm−2, thus restoring corrosion advantage. Both in vitro and in vivo investigations showed that coated ZL alloy had acceptable biocompatibility. Overall, the development of the photothermally controlled coating improved the Zn alloy's resistance to corrosion and allowed for the adjustment of the coated ZL alloy's rate of degradation through the use of 808 nm NIR laser irradiation.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Enze Li,Zelong Li,Hongli Zhu,Qiancheng Xia,Zihe Pan,Zhaozan Xu,Guandao Gao,Guoqing Guan,Fangqin Cheng
The sustainable and efficient lithium supply is one of the prerequisites and important supports for the transformation of global energy towards electrification and decarbonization. However, current established membrane materials for lithium recovery from salt-lake brine with high Mg/Li ratio still suffer from complex preparation process, poor stability and low selectivity. Herein, we develop a stable graphene oxide (GO)-based membrane with controllable interlayer spacing at angstrom level and positive charged surface through a facile method for highly efficient lithium separation. Specially, the interlayer spacing is precisely adjusted using dicarboxylic acids with different chain lengths through esterification reaction with GO sheets, and the poly(allylamine) (PAA) is coated on it to construct the positive charged surface. Experiments with DFT calculations demonstrate that the geometrical configuration of GO-dicarboxylic acid and the interlayer spacing with glutaric acid (GA) is most suitable for Li + separation. The synergy between crosslink of dicarboxylic acid and permeation of PAA enhances the stability of membrane. The obtained GO-GA-PAA membrane exhibits excellent Li + sieving performance with Li + /Mg 2+ selectivity up to 34.41 under the optimal operation condition, and outstanding cycling stability. The characterizations including solid zeta potential and atomic force microscope (AFM) indicate that the presence of positive charges on the surface can remarkably improve the Li + /Mg 2+ selectivity. The surface positive charge exerts stronger electrostatic repulsive towards Mg 2+ , which can also generate an interfacial electric field to induce the dehydration of Li + , ultimately promoting the transmission of Li + across the membrane. The synergistic effect of size sieving, electrostatic repulsive and interfacial electric field is proposed as the fundamental mechanism of Li + selective separation. This work opens an avenue for designing new strategies to recover lithium from salt-lake, which can also potentially be extended to the recovery of strategic metals from other complex systems.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Bingqin Li,Zhen Sun,Na Lv,Yaqi Hu,Liangxing Jiang,Zongliang Zhang,Fangyang Liu
All-solid-state lithium metal batteries (ASSLMBs) are considered promising candidates for next-generation energy storage systems. However, the growth of Li dendrites and interface side reactions hinder the practical application of ASSLMBs. To address these issues, a preformed Li–Ag alloy anode for an ASSLMB with the Li6PS5Cl electrolyte was constructed. The preformed Li–Ag alloy anode contains two distinct alloy layers, i.e., Li3Ag and Li0.98Ag0.02, with the former as a protection layer and the latter as a Li deposition site. Besides, a beneficial stable interlayer (Ag–P–S–Cl compound) produced by the reaction between Ag and Li6PS5Cl could work as a secondary protection layer between the anode and electrolyte. The dual protection (Li3Ag and Ag–P–S–Cl compound) suppresses dendritic growth and other interfacial issues effectively and simultaneously. Consequently, a LiCoO2/Li6PS5Cl/Li–Ag all-solid-state battery exhibits a remarkable specific capacity and excellent cycle stability. The dual-protection effect from the preformed Li–Ag alloy anode and the investigation of its working mechanism may enlighten a simple strategy for promoting the development of ASSLMBs.
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高影响因子
COMPOSITES PART B-ENGINEERING
·
2023
·
IF 13.1
Zirui Zhao,Shixun Yang,Mingwu Xiang,Jinkui Li,Dongyuan Lei,Junming Guo,Shulei Chou,Mingwei Yuan,Wei Bai,Xiaofang Liu
Inferior conductivity of sulfur and inevitable shuttle effect of polysulfides are major obstacle of commercial application for Li–S batteries. Balancing the relation between adsorption effect and polysulfides synchronous conversion on the surfaces of metal oxides is crucial. Herein, a combination strategy with graphitized porous carbon and bifunctional separator is proposed for the multiple suppression of shuttle effect by the synergistic adsorption and synchronous conversion of polysulfides. Silk cocoon derived in-situ N-doping porous carbon and nano-TiO 2 /Super P decorated bifunctional separator are prepared by simultaneous activation/carbonization and surface coating approach, respectively. The unique lamellar porous carbon and nano-TiO 2 effectively encapsulate active sulfur and immobilize polysulfides by the physical/chemical synergetic adsorption. The density functional theory calculations effectively testify that TiO 2 with exposed (101) plane shows high chemical affinity toward polysulfides. Especially the as-prepared porous carbon shows an ultrahigh degree of graphitization that enhances the electronic conductivity . The TiO 2 /Super P-coated conductive bifunctional separator not only accelerates the electron transmission but also synchronously facilitates the redox conversion of polysulfides adsorbed on the TiO 2 surface. Benefiting from the above structure merits, the optimized battery delivers high initial discharge capacity of 1311 mAh g −1 at 0.2C and good cycling stability with a low capacity decay of 0.037% per cycle at 1.0C as well as excellent rate capacity of 977 mAh g −1 at 2.0C. Even with 4.2 mg cm −2 , the discharge capacity of 697 mAh g −1 is still retained after 70 cycles at 0.1C. This combination strategy exploits a novel way for the design and preparation of advanced lithium-sulfur batteries.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jie Zhou,Yawen Li,Zhengfeng Zhu,Xiangfei Li,Kaijie Lu,Zhuoyuan Zheng,Yusong Zhu
The practical application of lithium metal anodes is hindered by uncontrolled growth of lithium dendrites, which can ulteriorly exacerbate at low or high temperature. To address these issues, a dense quasi-solid-state electrolyte (CPLZ) operating at wide-temperature-range is prepared based on cellulose acetate (CA) and polyvinylidene fluoride (PVDF) as polymer matrices, metal organic framework (ZIF-8) as nanofiller, LiTFSI as Li-ion source. The Raman spectra confirms the strong interaction between ZIF-8 and TFSI − and FTIR spectra verifies ZIF-8 weakens the adsorption of Li + on CA, which can promote Li salt dissociation, accelerate the Li + transport and regulate the Li + flux, thereby facilitating uniform lithium deposition. Meanwhile, the addition of ZIF-8 greatly improves dendrite suppression by enhancing CPLZ's mechanical strength. The obtained CPLZ electrolyte exhibits a high ionic conductivity over a wide temperature range (6.9 × 10 −4 S cm −1 at room temperature), a high ion migration number (0.57 at room temperature) and achieves the stable and reversible lithium deposition and stripping over 400 h. Furthermore, the assembled Li|CPLZ|LiFePO 4 cells exhibit the discharge-capacity of 133.9 mA h g −1 at 3C after 400 cycles at room temperature. Most importantly, thanks to high ion transport and interface stability, the Li|CPLZ|LiFePO 4 batteries exhibit an excellent wide-temperature-range operation with stable cycling over 500 cycles with the discharge-capacity of 138.1 mA h g −1 at 1C at 60 °C and the capacity retain up to 60 % of room temperature at −15 °C. This research provides valuable insights for advancing lithium metal batteries characterized by enhanced safety and prolonged cycle stability at wide-temperature-range.
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Small
·
2025
·Vol. 21
·期 40
·e01766
·
IF 12.1
Jinhu Wang,Ziqiang Wu,Kaiwen Wang,Zhuoqi Gong,Yihao Hu,Yao Zhang
Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) solid electrolyte, renowned for its high ionic conductivity and robust safety profile at room-temperature, holds tremendous promise for diverse applications. However, it faces significant challenges, including high interface impedance with lithium and a propensity for lithium dendrite formation. To address these issues, a novel Li 4 (BH 4 ) 3 I/2(d-BN) (LBHIbn) composite buffer layer — exhibiting high ionic conductivity and critical current density — is introduced at the LLZTO|Li interface. Theoretical calculations reveal that LBHIbn, serving as a protective layer of LLZTO, possesses a lower interface energy (0.366 J m −2 ) against lithium metal compared to LiBH 4 (0.434 J m −2 ). Consequently, at 30 °C, the interface impedance of the LLZTO | LBHIbn | Li system is significantly reduced to 4 Ω cm −2 . Simultaneously, the critical current density increases from 0.93 mA cm −2 of LLZTO | Li to 5.29 mA cm −2 (for LLZTO-LBHIbn | Li) with stable lithium-ion plating/stripping cycling demonstrated over 1000 h. Unlike conventional metal-based buffer layers that suffer from limited ionic conductivity, LBHIbn uniquely integrates high ionic conductivity (4.0 × 10−⁴ S cm −1 ) with superior electronic insulation (1.9 × 10−⁹ S cm −1 ), achieving simultaneous reduction of interfacial resistance (4Ω cm 2 at 30 °C) and effective suppression of lithium dendrite growth. This study demonstrates that the LBHIbn interface treatment effectively mitigates the interfacial issues between the LLZTO electrolyte and lithium anode, thereby expanding the potential applicability of hydride and oxide electrolyte materials in all-solid-state batteries
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高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Shou-Cong Dong,Rui Zeng,Hao Zhang,Shu-Ting Zhang,Pei-Pei Chen,Dong-Lin Zhao
Transition metal sulfides (TMSs) exhibit high theoretical capacity as anode materials for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). However, their practical application is severely hindered by poor cycling stability. In this study, Co 3 S₄/1T-MoS₂ heterostructure was confined on nitrogen-doped carbon nanosheets composite (Co 3 S₄/1T-MoS₂@NC) by high-temperature pyrolysis and hydrothermal sulfidation, using ZIF-67 as the precursor, modulated by a small-molecule carbon source. The heterostructure between Co 3 S₄ and 1T-MoS₂ synergistically enhances the electrical conductivity and rapid diffusion kinetics. The aggregation of MoS 2 nanosheets at the interface effectively enhances the electrochemical performance of the material, while the nitrogen-doped carbon generated at the interface provides additional active sites. This interface engineering and the formation of heterostructures endow the material with improved ion storage capabilities. The composite remains high specific capacities of 1192.2 mAh g⁻¹ for LIBs and 615.3 mAh g -1 for SIBs after 100 cycles at 0.1 A g -1 . The combination of enhanced charge transport and structural stability highlights the potential of the heterostructure strategy for next-generation high-performance alkali metal-ion batteries.
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高影响因子
HIGH PERFORMANCE POLYMERS
·
2023
·
IF 2.1
Xin Yue,Jinsheng Zhao
In this work, two D-A monomers 2,3-di(5-methylfuran-2-yl)-5,7-di(thiophene-2-yl) thiopheno[3,4-b] pyrazine (MFTTP) and 2,3-di(5-methylfuran-2-yl)-5,7-di(4-methoxythiophen-2-yl) thiopheno [3,4-b] pyrazine (MFMOTTP) were first obtained by Stille Coupling reaction, and then the corresponding composites were obtained by in-situ oxidative polymerization method with supercapacitor carbon. The surface morphology, chemical structure, and the element valence states of two materials were characterized by scanning electron microscopy, infrared and XPS, respectively. The specific surface areas of PMFTTP@SC and PMFMOTTP@SC are measured as 756.5 and 954.9 m2/g, respectively. The CV curves were used to determine the initial oxidative and initial reduction potentials, both polymers have a narrow band gap with Eg values below 1.5 eV, electron clouds in the HOMO and LUMO orbits of the polymer are mainly distributed on the aromatic rings of the polymer backbone. Polymer composite materials were used as the anode materials and the lithium sheets were used as counter electrode, and then lithium ion batteries are assembled. The first discharge specific capacities of PMFTTP@SC and PMFMOTTP@SC are 741.9 and 951.3 mAh/g at a current density of 100 mA/g, and as the electrodes are activated in the subsequent cycles, their coulomb efficiencies can reach more than 92% from the third cycle. In contrast, PMFMOTTP with methoxy-thiophene as the donor unit has higher conductivity and lower corresponding impedance due to its stronger electron donating ability and abundant pore structure, which is also more conducive to the lithiation/delithiation redox process.
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高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yang Zhan,Shun-zhi Yu,Shao-hua Luo,Jian Feng,Qing Wang
Transition-metal sulfides (TMS) are one of the most promising cathode catalysts for Li–O2 batteries (LOBs) owing to their excellent stabilities and inherent metallicity. In this work, a highly efficient mode has been used to synthesize Co@CNTs [pyrolysis products of metal–organic frameworks (MOFs)]-derived CoS2(CoS)@NC. Benefiting from the special yolk–shell hierarchical porous morphology, the existence of Co–N bonds, and dual-function catalytic activity (ORR/OER) of the open metal sites contributed by MOFs, the CoS2@NC-400/AB electrode illustrated excellent charge–discharge cycling for up to nearly 100 times at a current density of 0.1 mA cm–2 under a limited capacity of 500 mA h g–1 (based on the total weight of CoS2@NC and AB) with a high discharge voltage plateau and a low charge cut-off voltage. Meanwhile, the average transferred electron number (n) is around 3.7 per O2 molecule for CoS2@NC-400, which is the chief approach for a four-electron pathway of the ORR under alkaline media. Therefore, we believe that the novel CoS2@NC-400/AB electrode could serve as an excellent catalyst in the LOBs.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Shiliang Yang,Qilin Feng,Xiaoke Liu,Changmeng Xu,Xianyi Liu,Wenxin He,Jiangmin Jiang,Tao Ma,Jipeng Fu,Yichen Yin
The Zr-based chloride solid electrolyte (SE) Li2ZrCl6 is well compatible with 4 V-class cathodes and cost-effective, yet its low conductivity (<1 mS cm−1) would restrain the capacity delivery of the electrodes especially at high rates. Herein, we further elevated the room-temperature ionic conductivity of Zr-based lithium oxychloride to 2.11 mS cm−1 in Li2.15Zr0.85In0.15Cl4O by tuning its Li content through partial substitution of Zr4+ with In3+ in the formula Li2+xZr1−xInxCl4O. Cold-pressed Li2.15Zr0.85In0.15Cl4O presents both a dense morphology arising from its amorphous phase and enhanced ionic conductivity, which is significantly higher than that of Li2ZrCl6, facilitating better solid–solid contact and improved reaction kinetics in the composite cathodes. As a result, the all-solid-state cathode coupling Li2.15Zr0.85In0.15Cl4O and LiNi0.92Co0.03Mn0.05O2 shows a capacity of 175.3 mAh g−1 at 4C and a retention of 91.44% for 450 cycles when charged to 4.3 V vs. Li+/Li. More attractively, as the charge upper limit increases to 4.8 V, Li2.15Zr0.85In0.15Cl4O also enables ultrahigh-nickel cathodes to cycle for over 250 cycles with a capacity retention of 81.86%.
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高影响因子
ChemElectroChem
·
2022
·Vol. 9
·期 15
·e202200474
·
IF 4.782
Fanxuan Xie,Man Xiong,Jiapeng Liu,Jingwen Qian,Tao Mei,Jinghua Li,Jianyin Wang,Li Yu,Jan P. Hofmann,Xianbao Wang
Graphical WS 2 @C nanoflowers modified polypropylene separator (WS 2 @C-PP) can effectively adsorb lithium polysulfides and catalyze their conversion on the adsorptive/electrocatalytic sites of WS 2 . The unique design of the carbon coating on the WS 2 maximizes the synergism of polarity and conductivity, benefiting the recycling of the active materials, while forming the uniform and stable modified layer. Featuring high theoretical capacity, environmental friendliness and low cost, lithium-sulfur (Li-S) batteries become promising alternatives to satisfy the growing demand for energy storage. To boost their energy density for practical application, modified separators are needed to suppress shuttle effects resulting from the solubility of lithium polysulfides (LiPSs). Herein, we modified traditional polypropylene (PP) separators with functional WS 2 @C nanoflower composites (WS 2 @C-PP). They can effectively adsorb LiPSs and catalyze their conversion on the edge sites of the WS 2 . Also, the unique construction of a carbon layer coating on the WS 2 nanoflowers combines active sites and conducting properties. The material benefits the reversibility of redox reactions and reutilization of active materials. With the WS 2 @C-PP separator, the cell displays improved cycling stability and rate performance. When cycling at 0.1 C, the cell discharges a capacity of up to 1475 mAh g −1 , and it contributes 943 mAh g −1 originally at 1 C, with a decay rate of only 0.07 % after 500 cycles. Our work highlights the potential of functional separators to advance the properties of Li-S batteries.
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