ELECTROCHIMICA ACTA
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2023
·
IF 6.6
Liang Tan,Yijin Wu,Deliang Cheng,Renzong Hu
High-capacity storage in Li-ion batteries with graphite anodes remains a challenge at low temperature. By contrast, metal-based composite anode materials, including Sn metal, have shown good lithium storage capabilities at low temperature. However, the suitable low temperature electrolyte is still infancy to achieve high efficiency capacity of Sn-based anode in ultra-low temperature. Herein, a 2-methytetrahydrofuran (2Me-THF)-based low temperature electrolyte is proven to support the excellent lithium capability of Sn-based anode at ultra-low temperatures. The formulated 2Me-THF electrolyte exhibited small changes in viscosity and ionic conductivity with decreasing temperature. A SnO 2 -LiF-G (graphite) electrode with 1 M lithium bis(trifluoromethanesulfonyl)imide-(2Me-THF) electrolyte maintained 80% of the room temperature reversible capacity at -30°C and delivered a reversible capacity of 650 mAh g −1 , even at -50°C, under a current density of 100 mA g −1 . Furthermore, a detailed characterization based on Fourier Transform Infrared Spectroscopy, X-ray Photoelectron Spectroscopy and Time-of-flight Secondary ion Mass Spectrometry confirmed that the formed inorganic-rich solid electrolyte interphase on the electrode surface effectively maintained the solid-liquid interfacial stability at low temperature. This work provided design concepts for ultralow temperature electrolytes for metal-based anodes, which were especially helpful for further promoting batteries for low temperature applications.
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JOURNAL OF POWER SOURCES
·
2023
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IF 9.2
Xinjing Huang,Mengran Wang,Qiyu Wang,Qingyuan Dong,Bo Hong,Jie Li,Yanqing Lai
Lithium (Li) metal anode is the most promising anode for next-generation high-energy-density batteries due to the high theoretical specific capacity and the lowest redox potential . However, the uncontrollable growth of lithium dendrite and infinite volume expansion limit the development of Li metal-based batteries (LMBs). Introducing functional additives into electrolytes is considered as one of the efficient and economical strategies to suppress the Li dendrite growth and relieve the volume effect. Nevertheless, single-functional electrolyte additives can hardly comprehensively enhance the electrochemical performance of LMBs. Herein, boron-based anion receptor Tris(hexafluoroisopropyl) Borate (THFPB) is introduced into the electrolyte to weaken the interaction between the solvent and lithium ions , which regulates the lithium-ion desolvation process and enhance Li + migration, resulting in the formation of smooth, dense, and rich-inorganic solid electrolyte interphase (SEI) film. Strikingly, with 2 wt % THFPB additive, the Li||Li cell shows an extremely long cycle life of 4200 h, and the Li||Cu cell affords a high Coulombic efficiency (CE) of 99.87 %. The THFPB-modified electrolyte shows superior universality, which enhances the cycling and rate performance of the Li||S and Li||LiFePO 4 cells. Generally, this work provides a new perspective on the selection of new functional additives to achieve a long cycling life Li metal battery with great performance.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
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IF 6.2
Weixue Yang,Jiaqi Zhao,Zhen Li,Jiayu Xin,Fei Li,Yu Wang
Introducing light energy into the charging/discharging process is an effective strategy to reduce the overpotential of Li−O 2 battery, which leads that the battery has higher energy conversion efficiency and better battery performance. However, the development has been hampered by the lack of suitable photocatalysts and cathode structure to accommodate the insoluble Li 2 O 2 . In order to overcome the aforementioned difficulties, a bifunctional photocatalyst α-Fe 2 O 3 /SnO 2 (FS) heterojunction was designed as the cathode to improve the charging/discharging overpotentials simultaneously. The photogenerated electrons and holes from FS participated in the oxygen reduction reaction (ORR) and oxygen revolution reaction (OER) under illumination, giving rise to an ultra-low charging/discharging overpotential of 0.01 V (energy efficiency up to 99.7%), which improved the electrochemical reaction kinetics of the Li−O 2 battery strikingly. In addition, the FS cathode exhibited excellent cycle stability under light (the battery energy efficiency can still maintain 80% after 252 cycles). The bifunctional catalyst designed in this paper has profoundly proved that the band engineering strategy can effectively utilize solar energy and provide important insights for understanding the mechanism of photo-assisted Li−O 2 battery.
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ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 51
·2306868
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IF 19
Zhipeng Jiang,Tao Yang,Chen Li,Jiahang Zou,Hanxu Yang,Qingan Zhang,Yongtao Li
Ether-based electrolytes have high ionic conductivity and good stability toward the lithium metal anode relative to carbonate-based electrolytes, but they typically exhibit poor oxidation stability (<4 V vs Li + /Li). Most approaches aimed at enhancing the oxidative stability of ether-based electrolytes, such as “salt-in-solvent” and “weakly solvating” strategies, often sacrifice their inherent advantage of high ionic conductivity. Herein, this article proposes a cost-effective synergistic additive strategy by co-adding LiNO 3 and vinylene carbonate (VC) to achieve an optimized ether-based electrolyte (OEE) that simultaneously offers high Li-ion (Li + ) conductivity (11.52 mS cm −1 at 20 °C) and high-voltage stability (4.4 V). LiNO 3 and VC can enter the inner solvation shell of the electrolyte, preferentially participating in the film-forming progress at the electrode surface, leading to the formation of a unique organic–inorganic bilayer interfacial protective layer. This layer could effectively suppress electrolyte side reactions and enhance electrode stability. As a result, the 4.4 V Li-LiNi 0.8 Mn 0.1 Co 0.1 O 2 (NCM811) full cells assembled with the OEE exhibit stable cycling performance at both room temperature and low temperature. This work provides a new approach to the design of ether-based electrolytes for high-voltage lithium metal batteries.
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Journal of the Taiwan Institute of Chemical Engineers
·
2023
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IF 5.7
Jiawei Jiang,Yaru Wei,Junren Chen,Jianan Dai,Jing Ma,Liangsheng Qiang,Juanqin Xue,Weiwei Liu
Background Environmental pollution demands the fabrication of suitable nano-photocatalyst that works under visible-light irradiation. The effective interfacial engineering is required for better separation of charges. Semiconductor heterostructure promotes the practical separation of electron-hole pairs and enhances the carrier separation efficiency, which has broad application prospects in photocatalytic degradation of Antibiotics. However, it remains a significant challenge to construct high-quality directly heterostructure effectively. Methods In this work, a hierarchical ternary heterojunction (Li-C 3 N 4 /ZnO/BiOI) was facilely synthesized by employing an in-situ hydrothermal strategy with different ratios using Li-C 3 N 4 as an anchor, in which the interaction at heterointerfaces was enhanced to improve the photocatalytic performance. Significant findings The photocatalytic degradation experiment was carried out with Tetracycline (TC), and the effect of the molar ratio of Li-C 3 N 4 /ZnO to BiOI on the photocatalytic degradation performance was quantitatively investigated. Benefiting from the unique electronic structure of heterostructure, the results show that a degradation rate of 92.62% was achieved for 10 mg/L TC solution within 20 min. Moreover, Li-C 3 N 4 /ZnO/BiOI-5 offered high photocatalytic activity due to the type II and Z transport, resulting in a small forbidden band gap. The charge transport pathway improves the separation of photogenerated electron-hole pairs in Li-C 3 N 4 /ZnO/BiOI. This study provides a promising avenue for rational design and application of ternary composites.
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ADVANCED MATERIALS
·
2023
·
IF 29.4
Yingshan Huang,Chaonan Wang,Haifeng Lv,Yuansen Xie,Shaoyun Zhou,Yadong Ye,En Zhou,Tianyuan Zhu,Huanyu Xie,Wei Jiang,Xiaojun Wu,Xianghua Kong,Hongchang Jin,Hengxing Ji
The most successful lithium-ion batteries (LIBs) based on ethylene carbonate electrolytes and graphite anodes still suffer from severe energy and power loss at temperatures below −20 °C, which is because of high viscosity or even solidification of electrolytes, sluggish de-solvation of Li + at the electrode surface, and slow Li + transportation in solid electrolyte interphase (SEI). Here, a coherent lithium phosphide (Li 3 P) coating firmly bonding to the graphite surface to effectively address these challenges is engineered. The dense, continuous, and robust Li 3 P interphase with high ionic conductivity enhances Li + transportation across the SEI. Plus, it promotes Li + de-solvation through an electron transfer mechanism, which simultaneously accelerates the charge transport kinetics and stands against the co-intercalation of low-melting-point solvent molecules, such as propylene carbonate (PC), 1,3-dioxolane, and 1,2-dimethoxyethane. Consequently, an unprecedented combination of high-capacity retention and fast-charging ability for LIBs at low temperatures is achieved. In full-cells encompassing the Li 3 P-coated graphite anode and PC electrolytes, an impressive 70% of their room-temperature capacity is attained at −20 °C with a 4 C charging rate and a 65% capacity retention is achieved at −40 °C with a 0.05 C charging rate. This research pioneers a transformative trajectory in fortifying LIB performance in cryogenic environments.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Jianxiong Xing,Luo Yan,Tao Chen,Zhicui Song,Zihao Wang,Yuchi Liu,Liujiang Zhou,Jingze Li
Lithium (Li)-rich ternary alloy, comprising a multi-alloy phase as the built-in three-dimensional (3D) framework and a Li metal phase as a reversible Li reservoir, is a promising high-energy–density anode for rechargeable Li metal batteries. The introduction of metal/metalloid components to the alloy can effectively regulate Li deposition and maintain the dimensional integrity of the Li anode. Herein, the lithium–copper–zinc (Li–Cu–Zn) ternary alloy, as a new type of alloy anode, is synthesized via a facile thermal melting method. The fully delithiated 3D scaffold comprised two Cu–Zn alloy phases named CuZn and CuZn 5 . These alloy phases exhibit higher lithiophilicity and structural stability than Li–Zn and Li–Cu alloys. Moreover, the CuZn phase is electrochemically inert, ensuring the geometric stability of the anode, while the CuZn 5 phase can readily undergo alloying reaction with Li to form the LiZn phase, thereby facilitating uniform Li nucleation and deposition. The hybridized multiphase alloy structure and specific energy storage mechanism of the Cu–Zn based alloy scaffold in the ternary alloy anode facilitate dendrite-free Li deposition and prolonged cycle lifetime. The Li metal full battery based on lithium iron phosphate (LiFePO 4 ) cathode exhibits high cycling stability with high-capacity retention of 95.4% after 1000 cycles at 1C.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2023
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IF 2.6
Xudong Yu,Xia Feng,Shan Feng,Yun Peng,Ying Zeng
The solid–liquid equilibria of the quinary system Li+, K+, Mg2+//Cl–, B4O72––H2O at 323.2 K were investigated by the isothermal dissolution method. The solubility, refractive index, and density of the system were determined, and the corresponding space phase diagram, planar projection diagram, water content diagram, and density/refractive index vs composition diagrams saturated with MgB4O7 are constructed based on the experimental data. The result shows that there are double salts of lithium carnallite (LiCl·MgCl2·7H2O) and carnallite (KCl·MgCl2·6H2O) formed in the system. The space phase diagram consists of five invariant points, 16 isothermal solution curves, and eight crystalline regions (Li2B4O7·3H2O, K2B4O7·4H2O, KCl, MgB4O7·9H2O, KCl·MgCl2·6H2O, MgCl2·6H2O, LiCl·MgCl2·7H2O, LiCl·H2O). Under the saturation of salt MgB4O7, the crystalline region of Li2B4O7·3H2O is the largest in the planar projection diagram of this system, and the solubility of LiCl is the largest. A comparison of planar projection diagrams (under the saturation of salt MgB4O7) of the system at 273.2 and 323.2 K shows that the crystallization regions of Li2B4O7·3H2O, KCl·MgCl2·6H2O, LiCl·MgCl2·7H2O, and LiCl·H2O increase along with the temperature, while those of K2B4O7·4H2O and KCl decrease. The results show that low temperature is conducive to the extraction of potassium in the form of K2B4O7·4H2O and KCl and has less entrainment loss; high temperature is beneficial to the precipitation of Li2B4O7·3H2O.
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Small
·
2023
·Vol. 19
·期 49
·2303149
·
IF 13.3
Ping Li,Zhe Cheng,Jialu Liu,Lukang Che,Yingke Zhou,Enmin Xu,Xiaohui Tian,Zhongzhi Yuan
The electrode/electrolyte interfaces play an important role in the electrochemical reaction kinetics to alleviate the severe polarization and voltage hysteresis in lithium primary batteries. Herein, C 5 F 5 N is proposed as an electrolyte additive to tune the characteristics of the electrode/electrolyte interfaces. The Li/CF x primary battery with C 5 F 5 N additive exhibits an excellent discharge-specific capacity of 981.4 mAh g −1 (0.1 C), a remarkable high-rate capability of 598 mAh g −1 (15 C), and an outstanding energy/power density of 1068.7 Wh kg −1 /24362.5 W kg −1 . It also shows remarkable storage performance with 717.2 mAh g −1 at 0.1 C after storage at 55 °C for 2 months. The excellent performance of the Li/CF x batteries is closely related to the improved and stable Li 3 N/LiF-rich homogeneous interfaces induced by the C 5 F 5 N additive, which results in uniform distribution of Li + flux, facilitated electrochemical kinetics, and increased rate capability of Li/CF x battery. Therefore, C 5 F 5 N is expected to be a promising electrolyte additive, and the related electrode/electrolyte interface engineering provides an effective and facile strategy to increase the performance of the lithium primary battery.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Yiqing Yao,Hanxu Yang,Jianhui Li
The lithium metal anode is a desirable choice owing to its high theoretical specific capacity. Despite their promising potential, lithium metal batteries (LMBs) face significant challenges in practical applications, such as uncontrolled growth of lithium dendrites and an unstable interface that occurs during repeated deposition and exfoliation of the lithium anode Therefore, this study employs a simple chemical immersion method, which can not only construct a Li-Ca alloy protective layer to improve lithium-ion transport but also provide a LiF-rich interface to further enhance the mechanical strength of the protective layer. The obtained Li-Ca alloy-LiF hybrid layer shows improved performance of the lithium anode. The results indicate that the Li-Li symmetric cell composed of the treated Li can undergo stable cycling over 3000 h under various cycling conditions and also exhibit excellent cycle performance in the Li-LiFePO 4 cell.
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Materials Today Chemistry
·
2023
·
IF 7.3
S.Y. Fan,X.L. Xu,W.J. Wu
The utilization of quasi-solid conducting medium possessing superior interfacial properties represents a significant approach in tackling the issue of leakage and stability in supercapacitors . However, preserving the conductivity of ions like Li + and enabling their adaptability to high-temperature environments pose significant challenges to the improvement of water-locking capacity. Herein, a bimodal cross-linked hydrogel with a mesoporous structure has been developed based on the polyacrylamide-lithium chloride (PAM-LiCl) hydrogel system using polyethylene glycol (PEG). This hydrogel not only exhibits a high water-binding capacity but also facilitates the migration of Li-ions. Using activated carbon as the electrode material, the assembled quasi-solid state supercapacitor devices achieve a single electrode specific capacitance of 32.6 F/g at 0.1 A/g and an energy density of 1.77 W h/kg by varying the ratio of acrylamide and polyethylene glycol (AM/PEG). The findings of this study demonstrate that utilizing a bimodal cross-linked hydrogel can enable the operation of a supercapacitor at high temperatures above 140 °C.
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ENVIRONMENTAL TECHNOLOGY
·
2023
·
IF 2.8
Dong-yan Liu,Shi-neng Sun,Duan-yang Li
The recycling of cathode materials for spent NCM has always been a major concern for the energy industry. However, among the current processing methods, the general leaching efficiency of Li is between 85% and 93%, with much room for improvement. The recovery of Ni, Co and Mn requires a high cost of secondary purification. In this study, to recycle the NCM cathode material, a route of sulphated reduction roasting – selective Li water leaching – efficiency acid leaching of Ni, Co, Mn – extraction separation – crystallisation was adopted. The results showed that after roasting (a temperature of 800 °C, a reaction time of 90 min, a carbon content of 26%, and a sulphuric acid addition of nH2SO4:nLi = 0.85), Li water leaching efficiency was 98.6%, followed by acid leaching of Ni, Co and Mn at around 99%. Mn, Co were extracted with Di-(2-ethylhexyl) phosphoric acid and 2-Ethylhexyl phosphonic acid mono-2-ethylhexyl ester respectively to obtain Ni, Co, Mn solutions, which eventually were crystallized for manganese sulphate, cobalt sulphate, lithium carbonate and nickel sulphate products, with high purity of 99.40%, 98.95%, 99.10%, and 99.95%. The results of this study improved the leaching efficiency of Li and were closely linked to the actual industrial preparation of Ni, Co and Mn sulphates, providing a feasible and promising basis for spent NCM cathode materials industrial recovery.
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