CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Caohua He,Jianqi Sun,Chengyi Hou,Qinghong Zhang,Yaogang Li,Kerui Li,Hongzhi Wang
Ionogel electrolytes (IGEs) containing ionic liquids as the unique liquid component can guarantee high ionic conductivity, wide electrochemical window, and high thermal stability simultaneously for developing stable and safe Li metal batteries, yet suffer from relatively low Li + transference. In this work, ceramic ionic conductor-metal organic framework (MOF) core–shell nanocomposites are introduced as active matrix to fabricate a reinforcement layer with a high mechanical modulus. The ceramic core provides Li + conduction pathway and the MOF shell possesses open pores and metal sites for ionic selectivity. Beyond this, the reinforcement layer is sandwiched by two buffer layers with a flexible polymer matrix to improve the interface compatibility and wettability with electrodes. Here, the nanocomposites powder can be synthesized through solid sintering followed by facile in-situ solution growth, promising the scalable production and practical application of the IGEs. As a result, the sandwich-structural IGE shows a high ionic conductivity of 3.87 × 10 −4 S cm −1 at 25 ℃, wide electrochemical window (up to 5.2 V vs Li/Li + ), and high thermal stability. The full cell (LiCoO 2 cathode) maintains 97.9 % capacity after 500 cycles at 0.2 C.
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JOURNAL OF POWER SOURCES
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2022
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IF 9.794
Xirui Kong,Yichen Kong,Lang He,Wenna Zhang,Yi Song,Sheng Liu,Yan Zhao
A new ether-based electrolyte with tetrahydrofuran (THF) and di-isopropyl ether (DIPE) is proposed for Lithium–Sulfur battery (LSB). By employing the common ion effect and the weakly-solvating solvent (such as DIPE), the dissolution of lithium polysulfides and the self-discharge effect are effectively inhibited. Besides, the LiFSI has be used as the co-salt in the LiTFSI-based electrolyte to improve the ionic conductivity and inhibit the side reaction on Li metal anode . It is worth mentioning that, the L1L2TD-1382 electrolyte (LiTFSI: LiFSI: THF: DIPE = 1 : 3: 8 : 2, molar ratio) ensures a stable cycling for more than 500 cycles with a high Columbic efficiency (CE) of Li deposition/stripping (>99.3%). Impressively, with selenium doped sulfurized polyacrylonitrile (SeSPAN) cathode, the Li–S cell has delivered a high capacity of 626 mAh g −1 in 500th cycle with an excellent capacity retention no less than 93%. This work provides a new insight to electrolyte design strategy of advanced electrolytes for Li–S batteries .
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Qi Xia,Jinlong Hu,Qingqing Chen,Lingzhi Zhang
Se as an active material attracts tremendous attention because of its high volumetric capacity and better conductivity than S for rechargeable batteries. Herein, a carbon nanofiber membrane (PM-CNF) is designed and prepared as free-standing Se host by electrospinning the solution of polyacrylonitrile (PAN) and poly(styrenesulfonic acid)-melamine salt, followed by carbonization and activation process. PM-CNF shows super flexibility and high N-doping level of 8.92 % (pyrrolic-N: 2.15 % and pyridinic-N: 3.07 %), which is beneficial for ions diffusion and electrons transformation. The free-standing PM-CNF/Se cathode delivers a high reversible capacity of 570 mAh g −1 at 0.5 C, superior rate capacity of 375 mAh g −1 at 8 C, and stabile cycling over 1800 cycles. The excellent electrochemical performance can be ascribed to high Li-ion diffusion coefficient (2.99 × 10 −9 cm 2 s −1 ) and capacitance-contributed ratio (77.1 % at 0.1 mV s −1 ). The analysis of the charge/discharge process reveals that no polyselenide intermediates are observed during the first cycling process and thus the inhibited shuttle effect of polyselenides over cycling, which primarily contributes to the long cycling stability.
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JOURNAL OF MEMBRANE SCIENCE
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2022
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IF 10.53
Tianrun Gu,Runnan Zhang,Shiyu Zhang,Benbing Shi,Junhui Zhao,Zhen Wang,Mengying Long,Guangzhe Wang,Ting Qiu,Zhongyi Jiang
The efficient separation of Li + /Mg 2+ is the key to lithium extraction from salt lake brine. Herein, a multi-amino quaternary ammonium salt (3,5-dimethylhydrazide-benzyl trimethyl ammonium bromide, DHTAB) was designed and synthesized to modify pristine polyamide (PA) nanofiltration membranes. DHTAB was grafted on the surface of the PA nanofiltration membrane to construct a positively selective layer for Li + /Mg 2+ separation. The introduction of DHTAB increased the membrane surface charge density to +5.16 mC m −2 , which was nearly three times that of the pristine PA membrane. The increased charge density of the modified membrane led to a stronger Donnan exclusion for Mg 2+ , and accordingly a high MgCl 2 rejection of 99.2%. The modified membranes exhibited a high Li + /Mg 2+ separation factor of up to 60.1, when applied for MgCl 2 and LiCl binary solution, which exceeded all known PA-based nanofiltration membranes.
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CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
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2022
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IF 0.847
Zuhao Zhang,Xiaoyan Xie,Huixian Xie,Xiaokai Ding,Jiaxiang Cui,Chenyu Liu,Dong Luo,Zhan Lin
Cobalt-free Li-rich layered oxides (LLOs) such as Li 1.2 Mn 0.6 Ni 0.2 O 2 have attracted extensive attention owing to their high specific capacity and low cost. Nonetheless, numerous problems such as continuous voltage fading and capacity decay have become stumbling blocks in its commercial application. In this study, we propose an effective dual-site doping strategy by choosing Mo as the cation and F as the anion to enhance the capacity and cycling performance. The research demonstrates that the cycling stability of LLOs enhances with the doping ratio of Mo, and their capacity increases with the doping ratio of F. It is because Mo as a pillar enhances the structural stability and F doping is conducive to the activation of Li 2 MnO 3 . What's more, dual-site doping also promotes the diffusion of Li + and reduces the internal resistance of the electrode. Due to these improvements, the 5F3M sample still maintains a discharge capacity of 190.98 mAh g -1 after 100 cycles at 200 mA g -1 , which is much higher than 165.29 mAh g -1 of the Pristine sample. This discovery provides a new way to develop advanced layered oxide cathodes for both Na- and Li-ion batteries.
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JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
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2022
·Vol. 37
·期 2
·149-154
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IF 1.271
Sun Jiyang,Li Yiqiu,Guo Xiangxin
Li/garnet/LiFePO 4 solid-state battery was fabricated. The cathode contains LiFePO 4 , Ketjen black, poly(vinylidene fluoride):LiTFSI polymer as active material, electric conductor and Li-ion conducting binder, respectively. Polyvinylpyrrolidone was added into the cathode to improve cathode/electrolyte interfacial performance. When combined with polyvinylpyrrolidone additive, poly(vinylidene fluoride):polyvinylpyrrol idone:LiTFSI blend forms, and the cathode/electrolyte interfacial resistance reduces from 10.7 kΩ to 3.2 kΩ. The Li/garnet/LiFePO 4 solid-state battery shows 80% capacity retention after 100 cycles at 30 °C and 0.05 C. This study offers a general strategy to improve cathode/electrolyte interfacial performance and may enable the practical application of solid-state Li-metal batteries.
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JOURNAL OF RARE EARTHS
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2022
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IF 4.632
Yangyang Sheng,Liyan Ming,Lin Liu,Peng Lin,Junpeng Shi,Liang Song,Yun Zhang
In recent years, white persistent luminescence materials have received extensive attention due to the potential application of white light in the field of plant growth lighting. The white persistent luminescence materials synthesized by traditional methods either have strict requirements on the concentration of doped ions or cannot produce white light continuously and stably due to different decay rates of various emission centers, which limits their further application. In our work, we successfully synthesized a novel Li + -doped MgLuGaO 4 phosphor with stable white-light emission and long persistent luminescence. The broadband emission of MgLuGaO 4 :Li + is mainly located at 350 – 650 nm, which has no change at different decay time, showing stable white-light emission. The persistent luminescence intensity is increased by 3.8 times and the persistent luminescence time is extended from 24 h to more than 36 h by doping Li + ions. Stable white-light and long persistent luminescence emission make it promising to be used in plant growth lighting.
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ChemSusChem
·
2022
·Vol. 15
·期 6
·e202102562
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IF 9.14
Mewin Vincent,Venkata Sai Avvaru,Maciej Haranczyk,Vinodkumar Etacheri
Graphical Dual ion storage : A high-performance and ultralong-life Mg−Li hybrid battery is presented, with the cobalt-doped anatase (Ti 1- x Co x O 2- y ) nanosheet cathode exhibiting outstanding pseudocapacitance. In-situ X-ray diffraction measurements reveal the unique Mg−Li dual-ion storage mechanism. This tactic presents new opportunities to design advanced Mg−Li hybrid batteries. Despite the proposed safety, performance, and cost advantages, practical implementation of Mg−Li hybrid batteries is limited due to the unavailability of reliable cathodes compatible with the dual-ion system. Herein, a high-performance Mg−Li dual ion battery based upon cobalt-doped TiO 2 cathode was developed. Extremely pseudocapacitance-type Ti 1- x Co x O 2- y nanosheets consist of an optimum 3.57 % Co-atoms. This defective cathode delivered exceptional pseudocapacitance (maximum of 93 %), specific capacities (386 mAh g −1 at 25 mA g −1 ), rate performance (191 mAh g −1 at 1 A g −1 ), cyclability (3000 cycles at 1 A g −1 ), and coulombic efficiency (≈100 %) and fast charging (≈11 min). This performance was superior to the TiO 2 -based Mg−Li dual-ion battery cathodes reported earlier. Mechanistic studies revealed dual-ion intercalation pseudocapacitance with negligible structural changes. Excellent electrochemical performance of the cation-doped TiO 2 cathode was credited to the rapid pseudocapacitance-type Mg/Li-ion diffusion through the disorder generated by lattice distortions and oxygen vacancies. Ultrathin nature, large surface area, 2D morphology, and mesoporosity also contributed as secondary factors facilitating superior electrode-electrolyte interfacial kinetics. The demonstrated method of pseudocapacitance-type Mg−Li dual-ion intercalation by introducing lattice distortions/oxygen vacancies through selective doping can be utilized for the development of several other potential electrodes for high-performance Mg−Li dual-ion batteries.
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高影响因子
Journal of Energy Storage
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2023
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IF 9.4
Shengnan Lin,Tingan Zhang
With the upgrading of mobile and portable electronic devices, people have higher requirements for the performance of batteries , and anode materials, as one of the factors affecting the electrochemical performance of lithium ion storage, have become a hot spot of widespread concern. This paper illustrates a creative and effective strategy to synthesize four different NiCo-MOFs materials. After studying their respective unique structural features, it was found that, unlike the topologies of NiCo-PTA (terephthalic acid) and NiCo-H 3 BTC (trimesic acid), the substitution of Ni and Co for N occurred in NiCo-EDTA (ethylenediaminetetraacetic acid) and NiCo-BI (benzimidazole). Electrochemical studies show that NiCo-PTA, NiCo-EDTA, NiCo-H 3 BTC, and NiCo-BI all have high initial discharge specific capacities of 1770.41576.11905.1 and 1877.5 mAh/g at a current density of 100 mA/g. When NiCo-EDTA and NiCo-BI are cycled at a current density of 100 mA/g, the specific capacity decreases more slowly than NiCo-PTA and NiCo-H 3 BTC. Similarly, the capacity of NiCo-PTA and NiCo-H 3 BTC almost began to rise at the 70th cycle, the capacity of NiCo-BI began to rise at the 67th cycle, and NiCo-EDTA showed the slowest rise at the 78th cycle, they all showed excellent cycle performance.
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ACS Applied Materials & Interfaces
·
2023
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IF 9.5
Xiaoyang Chen,Jian Chen,Yijie Liu,Yang Liu,Yun Gao,Siwei Fan,Xiangxi He,Xiaohao Liu,Chao Shen,Yong Jiang,Li Li,Yun Qiao,Shulei Chou
Metal–CO2 batteries, especially Li–CO2 and Na–CO2 batteries, are regarded as ideal new-generation energy storage systems owing to their high energy density and extraordinary CO2 capture capability. However, the advancement of metal–CO2 batteries is still at an early stage. The problems caused by accumulation of carbonates during charge–discharge cycles, such as large polarization and poor reversibility, restrict their practical application. Therefore, designing efficient catalysts is crucial for promoting the decomposition of carbonate to improve the electrochemical performance of metal–CO2 batteries. Herein, we first adopted sea urchin-like γ-MnO2 as the cathode material for Li/Na–CO2 batteries. Benefiting from the unique structure and excellent catalytic activity of γ-MnO2, the as-prepared Li–CO2 and Na–CO2 batteries can achieve low overpotentials of 1.28 and 1.36 V, respectively, at a current density of 100 mA g–1 with a cutoff capacity of 1000 mA h g–1. The overpotentials are lower than those of most of the state-of-the-art catalysts in previous reports. After 100 and 50 cycles of Li–CO2 and Na–CO2 batteries, respectively, their charging termination voltages remain at around 4.1 and 3.9 V, respectively; such a low charging platform indicates the excellent catalytic activity of the γ-MnO2 cathode on the discharge products. Our findings offer a promising guideline to design efficient electrocatalysts for high-performance metal–CO2 batteries.
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ACS Applied Materials & Interfaces
·
2023
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IF 9.5
Hanzhen Peng,Langlang Chen,Yifeng Wang,Bokai Cao,De Li,Yong Chen
As a graphite-like material, the LiBC can deliver a high capacity up to 500 mA h g–1 in Li-ion batteries, which is dependent on the carbon precursor, the high-temperature treatment, and the lithium insufficiency. However, the underlying mechanism is still not clear for the electrochemical reactions of LiBC. In this work, the pristine LiBC was reacted with aqueous solutions of different alkalinity, which was delithiated chemically and retained the layered structure. According to the XPS and NMR results, the B–B bond might be produced through the aqueous reaction or the initial charge process, which can be oxidized (charged) and reduced (discharged) in the electrochemical measurements. In the Li-ion battery, the reversible capacity of LiBC increases evidently with the alkalinity of aqueous solution and significantly rises to a similar value of ca. 285 mA h g–1 under 200 cycles. Therefore, the specific capacity of LiBC should be contributed by the active sites of B–B bonds, which can be significantly increased through the reaction with the hydroxyl ions, and this strategy might be adopted to activate more graphite-like materials.
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ACS Applied Energy Materials
·
2021
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IF 6.024
Tao Long,Bin Xu,Yixin Zhao,Hu Liu,Sheng Cheng,Yongyi Zhang,Jiehua Liu,Fancheng Meng
The shuttling effect and sluggish redox kinetics of polysulfides are the main obstacles that restrict the practical application of lithium–sulfur (Li–S) batteries. Herein, in this work, cathode material embedded with bipolar metals Ti and Co prepared by a facile self-assembly process using hollow carbon nanospheres (HCSs), MXene nanosheets, and CoO(OH) has been reported. Due to the strong chemical adsorption and high catalytic activity introduced by the bipolar metal related active sites, the Li–S battery with the HCS@Co–MXene/S cathode shows the lowest charge transfer resistance and the best rate capability compared with HCS/S and HCS@MXene/S cathodes. Moreover, the battery delivers a high initial discharge capacity of 1309 mA h g–1, which maintains at 570 mA h g–1 after 300 cycles at 0.5 C. Even at an elevated discharge current of 1 C, the battery retains a reversible capacity of 728 mA h g–1 over 120 cycles. Therefore, with the embedding of bipolar metals, the current Li–S battery cathode demonstrates superior cycling stability than the reference cathodes. The findings in this work exhibit a promising prospect for facile assembling of the high-performance Li–S battery cathode and the resultant device.
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