JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Guiqiang Ai,Changquan Wu,Rui Su,Xuerui Yang,Naigen Zhou
Lithium-rich manganese-based oxides (LRMO) are promising cathodes for high-energy-density lithium-metal batteries owing to their high operating voltage and large reversible capacity, but suffer from severe interfacial degradation at high voltages (≥4.8 V), primarily triggered by lattice oxygen release, electrolyte oxidation, and HF-induced corrosion. Herein, we design a multifunctional siloxane-based electrolyte additive, 1,3,5-tris(3,3,3-trifluoropropyl)methylcyclotrisiloxane (TFSO), to regulate these coupled degradation processes. TFSO simultaneously acts as an oxygen scavenger and HF trap, suppressing lattice oxygen reactivity while converting HF into stable Si F/Si O species. Meanwhile, it promotes the formation of robust, inorganic-rich CEI/SEI layers, enabling dual interfacial stabilization and uniform lithium deposition. In addition, TFSO reconstructs the Li + solvation structure, reducing solvent participation in interfacial side reactions. As a result, the LRMO‖Li cell achieves 92.7% capacity retention after 300 cycles at 4.8 V, along with excellent wide-temperature performance (82.7% at 55 °C and 160 mAh g −1 at 0 °C). This work highlights an effective electrolyte design strategy for mitigating oxygen-triggered interfacial degradation in high-voltage lithium metal batteries. A multifunctional siloxane-based additive (TFSO) enables stable cycling of LRMO||Li batteries at 4.8 V by scavenging lattice oxygen and corrosive HF, forming robust dual interphases, and regulating Li + solvation to deliver excellent performance and wide-temperature tolerance. Download: Download high-res image (87KB) Download: Download full-size image
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高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Jiahao Chen,Hong Zhang,Hongzhu Chen,Enjie Xia,Yanmei Wu,Zhicheng Li
Solid-state Li-ion batteries (LIBs) have recently attracted much attention for their high safety and energy density . Polyvinylidene fluoride (PVDF) is as a potential electrolyte for solid-state LIBs due to its high permittivity, wide voltage window and excellent thermal stability. Here, Y 3+ -doped Li 29 Zr 9 Nb 3 O 40 (LZNO) Li-ionic conductor with room temperature conductivity (σ 25 ) of 1.26 × 10 −4 S cm −1 is prepared. LZNO decorated PVDF-based composite solid electrolytes (CSEs) are fabricated. The PVDF-based CSE with 10% (mass ratio) of LZNO shows σ 25 of 2.34 × 10 −4 S cm −1 , and has thermal stability with melting temperature up to 332 °C and voltage window of 4.8 V. The assembled Li ( Ni 0.8 Co 0.1 Mn 0.1 ) O 2 |CSE|Li cells show initial specific discharge capacity of 216.7 mAh g −1 at 0.1 C, and exhibit high capacity and cycle performance. LiFePO 4 |CSE|Li cells display initial specific discharge capacity of 137.4 mAh g −1 at 0.5 C and high cycle performance. Addition of LZNO powder in CSEs can inhibit the dehydrofluorination of PVDF during the charge-discharge of cells, alleviate the deterioration of interface resistance, and greatly improve the specific discharge capacity of cells at high rates.
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ACS Applied Energy Materials
·
2023
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IF 6.4
Yijia Shao,Chaozhong Li,Luoqian Li,Jian Liu,Shijun Liao
Lithium-rich manganese-based layered oxides (LMR) are considered one of the most promising cathode materials for the next generation of high-energy lithium-ion batteries for transportation and energy storage applications. However, the irreversible phase transition from a layered to a spinel structure coupled with the anion redox reaction leads to severe capacity degradation and voltage attenuation, hindering practical applications of LMR materials. In this work, we developed a superior LMR cathode material through a structure engineering strategy via a multisolvent solvothermal method. The resultant LMR cathode, with uniform particle size and porous structure, achieved a specific energy density of ∼933.00 Wh kg–1 (∼267.48 mAh g–1) at 0.2C and a capacity retention of ∼80% after 300 cycles in a voltage range of 2.0–4.8 V at 1C. We further revealed that the excellent performance of our LMR cathode is due to the abundant diffusion pathways, faster lithium-ion diffusion kinetics, and stable crystalline structure. Thus, this study is encouraging and provides an avenue for developing high-energy lithium-ion batteries.
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Weiwei Li,Bin Yang,Ruixue Pang,Linxin Zhong,Meiyun Zhang
Separators are essential for supplying ion transport channels and preventing short circuits. Despite considerable effort, high-performance separators with desirable overall properties such as excellent thermostability, wettability, and impressive properties for suppressing lithium dendrites and polysulfide intermediates remain elusive. Here, we present an aramid nanofiber (ANF) and metal–organic framework (MOF) composite separator (ANF@MOFs) utilizing in situ growth of MOFs onto the extremely porous ANF network substrate. Benefiting from the features of the excellent strength, modulus, and nanoporosity of the ANF network, as well as the enormous specific surface area and sufficient metal sites of MOFs, the resultant ANF@MOFs separator exhibits excellent mechanical strength (a tensile strength of 110.7 MPa and a modulus of 3.1 GPa), improved liquid electrolyte wettability (an electrolyte uptake of 258.3%), and exceptional thermal stability (dimensionally stable after heating at 200 °C for 0.5 h). The ANF@MOFs separator not only demonstrates promising capabilities for physically blocking and chemically adsorbing Li2S2/Li2S and hence suppressing the Li2Sx shuttle effect but also suppresses the perforation of lithium dendrites, resulting in remarkable electrochemical and safety features. The battery equipped with the ANF@MOFs separator has a high first-cycle discharge capacity of 1081.92 mAh g–1 and a prolonged cycling performance with a capacity of 876.36 mAh g–1 at 0.5 C after 200 cycles. As a result, the high-performance ANF@MOFs composite separator provides significant potential for future lithium–sulfur batteries.
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高影响因子
Sustainable Energy & Fuels
·
2023
·Vol. 7
·期 5
·1245-1255
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IF 5.6
Furong Zhang,Kunpeng Jiang,Guisheng Zhu,Huarui Xu,Xiuyun Zhang,Yunyun Zhao,Yejun Zhang,Qiangbin Wang,Pengfei Pang,Aibing Yu
Solid-state lithium batteries (SSLBs) are promising energy-storage devices. However, the low ionic conductivity of solid electrolytes and poor interface stability are two challenges to their commercial application. To alleviate these problems, we investigated three different composite modes of ZIF-8 and SiO2: (1) mechanical mixing of ZIF-8 and mesoporous SiO2 (ZIF-8+SiO2); (2) mesoporous SiO2 spheres adsorbed on the surface of ZIF-8 (ZIF-8/SiO2); (3) mesoporous SiO2 shell deposited on the surface of ZIF-8 (ZIF-8@SiO2). In particular, ZIF-8@SiO2/IL was obtained when ZIF-8@SiO2 with a hierarchical pore structure was used as the host of the Li+-containing ionic liquid (IL). By combining ZIF-8@SiO2/IL as a filler with polyethylene oxide and lithium bis(trifluoromethanesulfonyl)imide, the composite electrolyte (PZS-3) showed excellent performance. PZS-3 showed a high ionic conductivity (2.35 × 10−4 S cm−1 at 30 °C), wide electrochemical stability window (5.5 V), and high Li+ transference number (0.6), and excellent compatibility with the Li metal and electrodes. An SSLB composed of LiFePO4/PZS-3/Li exhibited outstanding cycling stability with an initial discharge capacity of 155.6 mA h g−1 at 0.2 C and capacity retention of 96.5% after 100 cycles. This novel design strategy offers a promising approach for MOFs composited with other inorganic materials to construct prospective hierarchical Li+ channels.
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JOURNAL OF LUMINESCENCE
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2022
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IF 4.171
Qingling Zeng,Wenxiang He,Ning Zhang,Dongcai Guo
Sr 2 SnO 4 :Eu 3+ phosphors were prepared by a co-precipitation combined with hydrothermal method for the first time, and Li + was introduced to improve its luminescence performance. X-ray diffraction analysis determined that Sr 2 SnO 4 :Eu 3+ , Li + phosphors were successfully synthesized. The effects and mechanisms of Li + doping on the luminescence properties of Sr 2 SnO 4 :Eu 3+ were specifically discussed. At 260 nm excitation, the fluorescence spectra of the products were dominated by the 5 D 0 - 7 F 1 characteristic emission peak of Eu 3+ at 598 nm, with the electric dipole transition 5 D 0 - 7 F 2 being distinctly lower than the magnetic dipole transition 5 D 0 - 7 F 1 , indicating that Eu 3+ selectively replaced the highly symmetrical defective sites of Sn 4+ . The luminous intensity and decay lifetime were significantly enhanced through co-doping Li + , which played an essential role as a charge compensator. The optimum doping concentration of Li + was 7%. Finally, the color purity of Sr 2 SnO 4 :Eu 3+ , Li + reached 99.9%, suggesting that it could be developed as a potential orange-emitting material for solid-state lighting.
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高影响因子
ACS Applied Energy Materials
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2022
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IF 6.959
Sen Jiang,Xin Xu,Junying Yin,Yue Lei,Xiaolan Wu,Yunfang Gao
Lithium metal batteries (LMBs) coupled with Ni-rich cathodes are promising next-generation solutions for high-energy-density energy storage devices. Nevertheless, many challenges concerning structural evolution of electrode materials as well as electrolyte decomposition, which mainly stem from a defect of the electrode–electrolyte interface (EEI) toward aggressive chemistries: Li metal anode (LMA), high nickel cathode materials, and LiPF6-based carbonate electrolytes, need to be addressed. In this work, the EEI layers on the LMA and LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode are tailored, and the hydrogen fluoride (HF) attack is eliminated by applying a multifunctional electrolyte additive allyltrimethylsilane (ATMS). Theoretical calculations and physicochemical characterizations reveal that the C═C and Si–C groups of ATMS can fulfill the bielectrode–electrolyte interphase regulation and HF capture, respectively. Consequently, by being incorporated with the ATMS additive, the Li/NCM811 battery delivers remarkably enhanced capacity retention of 82.9% with regard to the reference cell with the baseline electrolyte (46.4%) after 200 cycles, and the Li/Li cell exhibits a prolonged lifespan beyond 1000 h at 0.5 mA cm–2.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2022
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IF 3.119
Li-Rong Guo,Guo-Liang Nie,Rui-Zhi Cui,Wu Li,Yong-Ming Zhang
In addition to the common sodium salt, potassium salt, magnesium salt, and sulfate, salt lake brine is also rich in trace components in varying degrees, such as lithium, bromine, rubidium, cesium, and so forth, which is of great industrial value. These trace components are further concentrated and enriched in old brine during the process of evaporation and concentration of brine resources. In view of the coexistence characteristics of lithium, potassium, bromine, and other ions in old halide, the phase equilibria of quinary system Li+, Na+, K+/Br–, and SO42––H2O were studied by the isothermal dissolution equilibrium method at 298.15 K. The solubility data of the equilibrium liquid phase were measured, and the compositions of the solid phase as well as the crystal forms of the equilibrium solid phase were identified when the equilibrium was achieved. The corresponding 3D and dry-base phase diagrams (Na2SO4·10H2O, K2SO4, LiBr·2H2O, Li2SO4·H2O, KBr, and NaBr·2H2O saturated) were drawn based on the phase equilibrium experimental data. The research results of phase equilibria and phase diagrams reveal that the phase relations and crystallization–dissolution law of each component in solution lay a certain foundation for further research on multi-temperature phase equilibrium and thermodynamic properties of the high-component brine system and to provide basic thermodynamic data for guiding the rational development and comprehensive utilization of brine resources.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Jean Pierre Mwizerwa,Changyong Liu,Kun Xu,Ning Zhao,Zhangwei Chen,Jun Shen
Surface engineering of transition metal oxide cathode materials for Li-ion batteries is highly important to achieve high-capacity retention, high-rate capability, and long-life term. In this study, VSe 2 nanosheets are prepared and used as a surface sensitizer to enhance the electrochemical properties of LiFePO 4 (LFP) cathode material. The LiFePO 4 @VSe 2 (LFP@VSe 2 ) composite is formed by anchoring 1D-LFP particles with the as-prepared 2D-VSe 2 nanosheets by using an in-situ solution phase technique. When the LFP@VSe 2 composites are used as cathode materials for Li-ion batteries, the Li surface-controlled storage behavior of the batteries is reasonably enhanced. The performance is attributed to the improvement in the inherent Li-ion conductivity of LFP particles, thereby inhibiting surface diffusion drawbacks and decreasing charge transfer resistance. The exterior VSe 2 attached to the LFP serves as a second electrically conducting layer to increase conductivity into the entire electrode. Thus, these conditions enhance the electron transfer kinetics and surface stability of the LFP cathode. LFP@VSe 2 composite cathode exhibits an ultrastable specific capacity of 166.5 mAh g −1 after 100 cycles @ 0.1 C and can retain a specific capacity of 146.7 and 46.5 mAh g −1 after 700 and 2000 cycles respectively at a current rate of 0.3 C and 10 C.
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Polymer Chemistry
·
2022
·Vol. 13
·期 8
·1098-1106
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IF 5.364
Junjin Duan,Yi Gong,Dong Chen,Yuhong Ma,Changtong Song,Wantai Yang
In this study, we develop a direct, thermally initiated radical homopolymerization of vinyl ethers mediated by lithium salts CH3OLi and LiI. In the case of vinyl ether monomers having a hydroxyl group, for example, diethyleneglycol monovinyl ether (DEGV), a high molecular weight poly(DEGV) (Mn = 18 700) is produced in a high yield (≥68%) with negligible acetal formation. Most importantly, this method further enables the radical polymerization of alkyl vinyl ether (IBVE) which has no hydroxyl group to form hydrogen bonds to facilitate the radical polymerization. There are no evident structural defects caused by side reactions such as β-scission and hydrogen abstraction as the poly(IBVE) yield is up to about 50% and Mn = 8500. Under similar conditions, the poly(IBVE) yield of the control run is only 16.2%. Density functional theory calculations suggest that the interaction between Li+ and CC–O of IBVE significantly reduces the HOMO–LUMO energy gap from 6.83 eV to 4.61 eV. In addition, the changes in 1H-NMR chemical shifts of CH2CH–O– further support the existence of interaction between Li+ and CC–O. This cation-π complexation between Li+ and vinyl ether can effectively reduce the electron density of the vinyl group and as a result increases the stability of σ-radicals and suppresses unfavorable side reactions.
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高影响因子
CERAMICS INTERNATIONAL
·
2022
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IF 5.532
Yunfei Yao,Xiangyang Xu,Hongye Zhao,Yuanlin Tong,Yina Li
In the development of high-performance lithium-ion batteries (LIBs), the composition and structure of electrode materials are of critical importance. Silicon has a theoretical specific capacity 10 times that of graphite, nonetheless, its application as an anode material confronts challenge as it undergoes huge volume change and pulverization amidst the alloying and dealloying processes. Herein, a novel method to prepare a multilayer Si-based anode was proposed. Three layers, SiO 2 , nickel and triethylene glycol (TEG), were coated successively on Si nanoparticles , which served respectively as the sources of SiO x , sacrificial templates and carbon. Nickel can not only serve as a hollow template, but also play a catalytic role, which makes carbonization and redox reactions occur synchronously under a mild condition. Amid the carbonization process of TEG at 450 °C, several-nm-thick SiO 2 layer can react with the as-derived carbon to form a silicon suboxides (SiO x (0 < x < 2)) intermedium layer. After removing the nickel template, a micro-nano scaled Si@SiO x @void@C with conformal multilayer-structure can be obtained. The BET specific surface area and pore volume of powders were increased dramatically because of the derivation of abundant voids, which can not only buffer the swelling effect of silicon, but also provide richer ionic conductivity . The as-assembled half-cell with Si@SiOx@void@C as the anode material possesses high capacity (∼1000 mAh g −1 at 3 A g −1 ), long cycle life (300 cycles with 77% capacity retention) and good rate performance (558 mAh g −1 at 5 A g −1 ).
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Shijun Zhang,Qinjun Shao,Yan Su,Lei Xu,Qike Jiang,Jian Chen
Lithium-sulfur (Li-S) battery possess the advantage of high specific energy but suffer from unstable cyclic performance due to the sluggish liquid-solid conversion kinetics causing severe lithium polysulfides (LiPS) shuttling. Designing multifunctional electrocatalysts with improved activity and abundant active sites to regulate the dynamics for sulfur electrochemistry is still a significant challenge. Herein, we proposed a thiourea assisted pyrolysis combined with hard template method to synthesize cobalt single atoms co-coordinated by N and S atoms embedded hollow carbon spheres (Co-NS-HCS) as a novel sulfur host. The Co-NS-HCS mainly consists of well-dispersed Co-N 3 S-C center sites where Co is co-bonded by N and S atoms. Systematical characterizations revealed that the Co-NS-HCS exhibit improved SRR electrocatalytic properties with higher exchange current density and larger electron transfer number than that of Co-N-HCS. When equipped in sulfur cathodes, the S@Co-NS-HCS exhibits superior rate performance (925 mAh g −1 at 2 C), long cycle stability (69.1% of capacity retention after 500 cycles at 1 C). Moreover, the assembled Li-S pouch type cell also exhibits competitive cyclic performance that work stably for 100 cycles at 0.1 C with a high capacity retention of 84.7%. This work furnishes a feasible scheme for the rational design of single atoms catalysts with improved electrocatalytic activity for sulfur cathodes based on the coordination environment regulation strategy.
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