JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Yuzhi Chen,Boliang Ma,Qingchuan Wang,Limin Liu,Luyao Wang,Shujiang Ding,Wei Yu
Li||LiFePO 4 (LFP) batteries have good stability and high energy density . However, they exhibit unsatisfactory low-temperature electrochemical performance . Due to the fragile interfacial passivation layers and sluggish kinetics, commercial electrolytes fail to simultaneously achieve acceptable stabilization with dual electrodes in low-temperature Li||LFP batteries. Herein, a novel localized high-concentration electrolyte (LHCE) with great dual-electrodes compatibility is proposed to match with the low-temperature Li||LFP batteries. With increasing local concentration, the FSI - sequentially replaces the solvent molecules and enters the first solvation sheath, forming the anion-dominated solvation structures. This effectively suppresses free solvents decomposition and constructs the anion-derived passivation layers with inorganic-rich components, further contributing to the rapid transport kinetics and endowing the LHCE with great dual electrodes compatibility. These dual-electrodes co-stabilization effects of the LHCE are originally clarified in the low-temperature Li||LFP batteries. The designed LHCE also delivers low freezing point (-99.8 ℃), high ionic conductivity (2.4 mS cm −1 at −40 ℃), and superior stability (>4.7 V vs. Li/Li + ). Hence, the Li||LFP batteries with LHCE possess superb cyclic stability at low temperatures, delivering a high discharge capacity of 120 mAh g −1 over 300 cycles at −20 ℃. Moreover, compared to commercial electrolytes, LHCE endows the Li||LFP batteries with superior low-temperature performances under practical conditions, including limited Li anode (3 mAh cm −2 ) and a wide temperature range (30 ℃ to −40 ℃).
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yuanjun Zhao,Mengqiu Gao,Yanyang Qin,Xinyu Da,Xuetian Deng,Xin Jia,Kai Xi,Yaqiong Su,Shujiang Ding,Qiang Rong,Xiangpeng Kong,Guoxin Gao
Fabricating flexible composite polymer electrolytes (CPEs) with vertically aligned ion transport pathways is necessary for the application of solid-state lithium metal batteries (LMBs), yet the orientation of polymer matrix usually is disorder, thus the improvement in ionic conductivity is unsatisfied. Herein, we develop a simple electric field induced molecular orientation strategy to fabricate the flexible CPEs with vertically aligned ion transport pathways. Driven by direct current (DC) electric field (e.g. 1.5 MV m −1 ), the polar 15C5-Li + dipoles and monomer molecules are oriented regularly and cured to form flexible three dimension (3D) cross-linked structure. As a result, numerous vertically-aligned ion transport pathways have been generated in the vertically oriented arrangement CPEs, thus presenting highly enhanced ionic conductivities, mechanical strength and superb inhibition ability to lithium dendrite growth. When used as CPEs for Li||LiFePO 4 (LFP) batteries, the vertically oriented CPEs exhibit excellent rate and long-term cycle stability with a reversible discharge capability of 124.9 mAh g −1 after 350 cycles at 1C and 60 °C. However, the randomly oriented CPEs deliver much poor cycle and rate performance at the same conduction. It can also be compatible with NCM811|Li batteries at 30 °C. Therefore, our simple DC electric field induced molecular orientation strategy holds a great application promise to construct the fast ion transport channels for the all-solid-state LMBs.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
·
2024
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IF 4.1
Haomin Wu,Wencan Ma,Xin Huang,Yifeng Cai,Junheng Li,Qiaobo Liao,Kai Xi,Qiuhong Zhang,Xudong Jia
Single-ion quasi-solid-state electrolytes (SIQSSEs) attract increasingly attention recently, due to their ability in suppressing the growth of lithium dendrite and offering higher safety. However, the low ionic conductivity is still the major bottleneck for preventing the practical application. Covalent organic frameworks (COFs) are considered as potential candidates for quasi-solid-state electrolytes (QSSEs) due to their high porosity and ordered structures. Herein, we demonstrate a series of crystalline covalent organic frameworks with sulfonimide groups as a new class of single-ion electrolytes. Owing to the directional lithium transport pathway and adequate binding site for lithium-ions, these COF-based electrolytes deliver good ionic conductivity (4.3×10-4 S cm-1) at 298 K, with high lithium transference number (LTN, ~0.90) and a low activation energy (0.24 eV). We also find both strong electron-withdrawing substituent and delocalized substituent could promote lithium-ion transportation. Furthermore, the Li||LiFePO4 (LFP) cells based on the sulfonimide-functionalized covalent organic framework (SF-COF) electrolytes deliver outstanding rate performance with long cycle life (99% capacity retention after 100 cycles at 0.2 C). Our work demonstrates that crystalline covalent organic frameworks show great potential for application as building blocks of solid electrolytes in lithium metal batteries.
研究领域:
材料科学
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电化学
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能量存储
✓ 已验证
DOI
高影响因子
Materials Today Energy
·
2021
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IF 7.311
Shufeng Song,Weiling Gao,Guanming Yang,Yanfang Zhai,Jianyao Yao,Liyang Lin,Weiping Tang,Ning Hu,Li Lu
Building safe and high-energy-density lithium metal batteries (LMBs) is currently being pursued to sustain our modern lifestyles. However, new electrolyte engineering is rigorously required that is capable of simultaneously providing good protection on lithium metal anode and sustaining high oxidative stability at the cathode, besides sufficient bulk conductivity and low interfacial resistance. Here, we report a novel hybrid poly-ether/carbonate ester quasi-solid-state electrolyte with high oxidative stability formed by a simple and efficient in situ polymerization of strategy, in which ring-opening polymerization of ether-based 1,3-dioxolane (DOL) and ester-based ethylene carbonate (EC)-ethylmethyl carbonate (EMC) is initiated by rare-earth triflate catalyst Sc(OTf) 3 at room temperature. Such electrolyte engineering not only achieves a sufficiently high ionic conductivity of 5 × 10 −4 S cm −1 but enables a high anodic voltage limit of 5 V while maintaining feasible battery manufacture technology. The hybrid poly-DOL/EC/EMC quasi-solid-state electrolyte is capable of producing a stable solid electrolyte interphase (SEI) featuring Li plating/stripping over 500 h at 0.5 mA cm −2 and decreased charge transfer resistance. The derived Li||LiFePO 4 quasi-solid-state LMB, benefited from the enhanced oxidative stability of electrolyte, exhibits a notable capacity of 169 mAh g −1 at 1C with no capacity decay after 300 cycles.
研究领域:
材料科学
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电化学
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能源存储
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电池技术
✓ 已验证
产品关联
DOI
高影响因子
Nano-Micro Letters
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2022
·Vol. 14
·期 1
·1-14
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IF 23.655
Li Xinyang,Wang Yong,Xi Kai,Yu Wei,Feng Jie,Gao Guoxin,Wu Hu,Jiang Qiu,Abdelkader Amr,Hua Weibo,Zhong Guiming,Ding Shujiang
The composite gel electrolyte with low tortuosity ion-conducting arrays (GPE/ICAs) exhibiting high room-temperature ionic conductivity (1.08 mS cm −1 ) was successfully prepared by directionally growing ice crystals and in-situ polymerization.
The stable and rapid Li + migration through ICAs in the GPE is proved by 6 Li solid-state nuclear magnetic resonance and synchrotron radiation X-ray diffraction combined with computer simulations.
Li/LiFePO 4 full cells using GPE/ICAs exhibit excellent cycle performance and high-capacity retention at wide temperature (0–60 °C), which has the potential towards all-weather practical solid-state batteries.
研究领域:
材料科学
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电化学
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电池技术
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
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2023
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IF 9.2
Yuli Wang,Zonglei Wang,Yunyang Zhao,Xueting Yang,Jie Xu,Xianke Ye,Xiancai Jiang,Yazhou Chen,Chen Li,Dezhan Ye
In-situ polymerization of gel polymer electrolyte (GPE) is expected to be promising approach to solve the safety and interfacial problems of lithium ion battery, but it is still challenging ways to tradeoff the high electrochemical properties and mechanical toughness. Here, 30 μm thickness of free-standing GPEs with extremely high monomer conversion were obtained by in-situ UV approach on lithium metal anode within only few seconds. The coordination of amide and aliphatic carbonyl groups with lithium ion endows the tough mechanical properties, which tensile strength and elongation at break reach up to ∼1.0 MPa and ∼920 %. Furthermore, the good degree of graphitization on the surface of burned polymer gel contribute to its flame resistance. The ionic conductivity and lithium ion transferance number are up to 1.03 mS/cm and 0.44 at room temperature , respectively. Finally, Li/LiFePO 4 half cells assembled with the optimized GPEs exhibit stable cycle performance at 0.5C rate, delivering 77.44 % of capacity retention after 1000 cycles.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2020
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IF 2.029
Wanwan Wang,Zhiqiang Fang,Ming Zhao,Yan Peng,Jiujun Zhang,Shiyou Guan
In this work, composite membranes consisting of triethylmethylammonium bis(fluorosulfonyl)imide (N 1222 FSI), poly(ethylene oxide) (PEO) and lithium bis(fluorosulfonyl) imide (LiFSI) have been produced as solid polymer electrolytes (SPEs). The composite SPEs provide good mechanical property, high ionic conductivity at 50 °C, high electrochemical and thermal stability as well as superior interfacial compatibility with lithium metal. Moreover, Li/LiFePO 4 cells containing the best-performing SPE exhibit high discharge capacity and excellent cycling performance. The results show that the novel composite SPEs might be promising electrolytes applied in all-solid-state lithium batteries.
研究领域:
材料科学
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电化学
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电池技术
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-10
·
IF 16.6
Jin Chengbin,Huang Yiyu,Li Lanhang,Wei Guoying,Li Hongyan,Shang Qiyao,Ju Zhijin,Lu Gongxun,Zheng Jiale,Sheng Ouwei,Tao Xinyong
Reactive negative electrodes like lithium (Li) suffer serious chemical and electrochemical corrosion by electrolytes during battery storage and operation, resulting in rapidly deteriorated cyclability and short lifespans of batteries. Li corrosion supposedly relates to the features of solid-electrolyte-interphase (SEI). Herein, we quantitatively monitor the Li corrosion and SEI progression (e.g., dissolution, reformation) in typical electrolytes through devised electrochemical tools and cryo-electron microscopy. The continuous Li corrosion is validated to be positively correlated with SEI dissolution. More importantly, an anti-corrosion and interface-stabilizing artificial passivation layer comprising low-solubility polymer and metal fluoride is designed. Prolonged operations of Li symmetric cells and Li | |LiFePO 4 cells with reduced Li corrosion by ~74% are achieved (0.66 versus 2.5 μAh h −1 ). The success can further be extended to ampere-hour-scale pouch cells. This work uncovers the SEI dissolution and its correlation with Li corrosion, enabling the durable operation of Li metal batteries by reducing the Li loss.
研究领域:
材料科学
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电化学
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电池技术
✓ 已验证
DOI
高影响因子
POLYMER
·
2018
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IF 3.483
Hao Xu,Ailian Wang,Xu Liu,Di Feng,Shi Wang,Jie Chen,Yan An,Liaoyun Zhang
The trade-off between ionic conductivity and mechanical strength is still a great challenge for all-solid-state polymer electrolyte . Herein, a novel structure-controlled fluorine-containing star-branched polymer (HBPS-(PTFEMA- b -PPEGMA) 27 ) with a hyperbranched polystyrene core and polytrifluoroethyl methacrylate-block-poly (ethylene glycol) methyl ether methacrylate arms is synthesized by atom transfer radical polymerization . Combining the good mechanical strength of fluorine-containing segments and flexible property of PEG segments, the prepared HBPS-(PTFEMA- b -PPEGMA) 27 /LiTFSI solid polymer electrolyte can form flexible transparent self-standing membrane and exhibits the high ionic conductivity of 2.4 × 10 −5 S cm -1 at 25 °C, as well as good thermal stability with the thermal decomposition temperature of 374.7 °C. It also possesses a wide electrochemical window of 4.9 V and good interfacial compatibility. Moreover, the Li/LiFePO 4 cell based on this solid state star-branched polymer electrolyte membrane delivers a high discharge capacity of 147.2 mAh g −1 under a current density of 0.1C at 60 °C.
研究领域:
材料科学
·
电化学
·
聚合物化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）