JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2017
·Vol. 164
·期 6
·A1321
·
IF 3.259
Chaolumen Wu,Taoran Li,Chenbo Liao,Qingkai Xu,Yuancheng Cao,Lei Li,Jun Yang
Triethylene glycol dimethyl ether (G3) is evaluated as an electrolyte solvent for non-aqueous lithium-oxygen (Li-O2) batteries. A liquid electrolyte of 1 M LiTFSI in G3 shows lower viscosity, higher oxygen solubility and diffusion, higher ionic conductivity and lithium ionic transference number compared to the conventional liquid electrolyte of 1 M LiTFSI in tetraethylene glycol dimethyl ether (G4). Then the Li-O2 battery using the G3-based electrolyte shows better cycling stability and higher rate capability compared to the battery using the G4-based electrolyte. At a higher current density of 2.5 A gcarbon−1, the discharge capacity of the battery using the G3-based electrolyte is about 1472 mAh gcarbon−1, which is about four times higher than that of the battery using the G4-based electrolyte. At current density of 1 A gcarbon−1 with a fixed capacity of 1000 mAh gcarbon−1, the battery using the G3-based electrolyte can be operated stably for 80 cycles, while only 20 cycles are achieved by using the G4-based electrolyte. Therefore, we think the G3-based electrolyte could be a proper alternative electrolyte to the conventional G4-based electrolyte for the development of Li-O2 batteries.
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高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Jun Ban,Xingxing Jiao,Yangyang Feng,Jing Xue,Cheng He,Jiangxuan Song
Lithium/fluorinated carbon (Li/CFx) batteries have received widespread attention due to their high specific energy density. However, the development of Li/CFx primary batteries is seriously hampered owing to the low electrical conductivity and poor wettability against the fluorinated carbon electrolyte. Here, we report a CFx-compatible fluorinated ether-containing electrolyte for all-temperature high-energy-density Li/CFx primary batteries. Specifically, a CFx-philic 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (TTE) is introduced to the carbonate-based electrolyte as a cosolvent. Benefiting from the low viscosity and low freezing point of TTE, the conductivity and wettability are drastically improved, contributing to a lowered charge-transfer resistance. Thus, the modified electrolyte with TTE endows Li/CFx batteries with high energy density of 850 Wh kg–1 at 25 °C and 745 Wh kg–1 at 55 °C under the current density of 5000 mA g–1, accompanied by high power density of 9931 and 10046 W kg–1, respectively. Even at the freezing temperature of −50 °C, Li/CFx batteries can still exhibit a high middle value of voltage of 1.91 V, and the discharge capacity is 299 mAh g–1 at 100 mA g–1. The improvement of electrochemical performance over a wide temperature range from −50 to 55 °C has greatly expanded the application of Li/CFx batteries.
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高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Rundi Xiong,Lixia Yuan,Ruifeng Song,Shuaipeng Hao,Haijin Ji,Zexiao Cheng,Yi Zhang,Bowen Jiang,Yudi Shao,Zhen Li,Yunhui Huang
Superionic halides have attracted widespread attention as solid electrolytes due to their excellent ionic conductivity, soft texture, and stability toward high-voltage electrode materials. Among them, Li3InCl6 has aroused interest since it can be easily synthesized in water or ethanol. However, investigations into the influence of solvents on both the crystal structure and properties remain unexplored. In this work, Li3InCl6 is synthesized by three different solvents: water, ethanol, and water–ethanol mixture, and the difference in properties has been studied. The results show that the product obtained by the ethanol solvent demonstrates the largest unit cell parameters with more vacancies, which tend to crystallize on the (131) plane and provide the 3D isotropic network migration for lithium-ions. Thus, it exhibits the highest ionic conductivity (1.06 mS cm–1) at room temperature and the lowest binding energy (0.272 eV). The assembled all-solid-state lithium metal batteries (ASSLMBs) employing Li3InCl6 electrolytes demonstrate a high initial discharge capacity of 153.9 mA h g–1 at 0.1 C (1 C = 170 mA h g–1) and the reversible capacity retention rate can reach 82.83% after 50 cycles. This work studies the difference in ionic conductivity between Li3InCl6 electrolytes synthesized by different solvents, which can provide a reference for the future synthesis of halide electrolytes and enable their practical application in halide-based ASSLMBs with a high energy density.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 44
·20671-20685
·
IF 3.5
Wang Jiashuai,Wang Chengdeng,Shi Haofeng,Wang Zhaokun,Wang Zhi,Li Jin peng,Chen Xiangrui,Gao Yan,Bai Zhiming,Yan Xiaoqin
The interface instability between a Li-excess cation disordered rocksalt cathode (DRX) and sulfide solid electrolyte (SE) results in rapid capacity fade. It is well established that cathode coatings are important to mitigate the side reaction at interfaces and therefore increasing the reversible specific capacity of all-solid-state Li batteries (ASSLBs). However, internal mechanism remains blurry, and the effects of the coating layer on electrode/electrolyte interface and capacity degradation have not been fully clarified. In this work, we used various coating materials on Li 1.2 Ni 0.3 Ti 0.3 Nb 0.2 O 2 (LNTNO) cathodes to investigate the behavior of the DRX/SE interfaces. The electrochemical performances are compared of uncoated, Li 2 ZrO 3 -coated, LiNbO 3 -coated, and Li 3 BO 3 (LBO)-coated cathodes in Li 6 PS 5 Cl-based ASSLBs in long charge–discharge processes. The results demonstrate that all coated LNTNO could improve specific capacity and cycle performance. Li 3 BO 3 is identified as a superior coating with good structural stability that exhibits observably large discharge capacity (206 mAh g −1 at 10 mA g −1 ), long cycle life (100 cycles, capacity retention of 78%), as well as outstanding rate property. Combined with ex situ X-ray photoelectron spectroscopy and scanning electron microscope, we can observe the side reactions at cathode/electrolyte interface can be mitigated after the LBO coating layer, enabling fast lithium transport dynamics. This work highlights the critical role of having an appropriate coating layer and offers a promising path to enhance the electrochemical behaviors of ASSLBs. Graphical abstract
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高影响因子
ACS Applied Energy Materials
·
2024
·
IF 5.4
Ruliang Liu,Shimei Song,Jiaqi Xue,Huiping Deng,Suixiang Li,Qingwei Cheng
Lithium metal anodes are promising candidates for next-generation high-energy density batteries. Unstable lithium–electrolyte interfaces caused by uncontrolled dendrite growth and side reactions still hinder its practical process. In this work, an all-organic solid electrolyte interphase (SEI) film coupling hardness with softness has been prepared to achieve a dendrite-free lithium metal anode by designing polymer brushes rationally (poly(diethylene glycol methyl ether methacrylate) (PEGM) and poly(2,2,2-trifluoroethyl acrylate) (PTFEA) from bacterial cellulose (BC), denoted as BC-g-P(EGM-co-TFEA)). The rigid BC skeleton can significantly enhance the mechanical strength to depress Li dendrite growth. Furthermore, flexible P(EGM-co-TFEA) side chains are able to homogenize lithium-ion flux, inducing the generation of LiF, boost ion conductivity, and maintain good electrode interface contact. As a result, Li/Li symmetric cells with a BC-g-P(EGM-co-TFEA)-protective film enable long-term (1500 h) reversible lithium plating/stripping at a high current density of 10 mA cm–2, while the Li@BC-g-P(EGM-co-TFEA)/LiFePO4 cell maintains a small capacity decay per cycle of 4% during 500 cycles at 3 C. This work could provide an innovative strategy to develop superior artificial SEI films for inhibiting Li dendrite growth on the Li metal anode.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Chenyu Zhao,Runze Fan,Balaji Murugesan,Yan Xu,Jiahui Ma,Juming Yao,Izabella Krucinska,Yurong Cai,Junkuo Gao
Biomass-derived carbon is considered a promising alternative to commercial graphite anode because of its renewability and tunable physical/chemical properties. However, the specific capacity and rate capability of biochar anode materials must be further enhanced to satisfy the increasing energy demand. Here, we report a facile strategy to synthesize uniform Fe 3 C inserted sericin-derived porous carbon (Fe 3 C/SC) via coordination with Fe 3+ ions to the carboxylate radicals of sericin protein. The obtained composite retains a hierarchical pore structure with an interconnected carbon scaffold. In particular, the embedded Fe 3 C nanoparticles (NPs) in the carbon matrix will serve as a catalyst for the modification of the solid electrolyte interphase (SEI) layer during the cycles, which effectively enhance reversible capacity. The resulting anode provides high reversible capacity (584.0 mAh g −1 at 0.1 A g −1 after 150 cycles), superior rate capability (259.0 mAh g −1 at 2 A g −1 ) and remarkable cycling stability under high current density (219.7 mAh g −1 retention at 2 A g −1 after 600 cycles). This composite is expected to be one of the most potential anode materials for lithium-ion batteries, owning to its cost-effective, facile synthesis and efficient performance with excellent electrochemical properties .
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高影响因子
RARE METALS
·
2022
·Vol. 42
·期 3
·875-884
·
IF 6.318
Wang Xin,Shen Xiu,Zhang Peng,Zhou Ai-Jun,Zhao Jin-Bao
In the polyoxyethylene (PEO)-based solid-state electrolytes, the low ionic conductivity of lithium ions limits its application in solid-state lithium batteries, so optimizing the conduction path of lithium ions is beneficial to improve the ionic conductivity. In this work, we report the use of hydrothermal carbon nano-sphere (HCS) modified glass fibers (GF) as a functional filler (GF@HCS) to improve the ionic conductivity of PEO composite solid-state electrolytes. The oxygen atoms in the hydroxyl groups on the surface of HCS can be complexed with Li ions as its transport sites, which means that it can promote the long-distance transport of Li ions along the glass fiber surface. With addition of 2 wt% GF@HCS fillers, the degree of crystallinity of PEO composite solid-state electrolyte is the smallest, and the ionic conductivity is significantly increased from 8.9 × 10 –5 to 4.4 × 10 –4 S·cm −1 at 60 °C. Moreover, the PEO composite solid-state electrolyte exhibits better lithium–metal interface stability in symmetric lithium batteries and superior rate performance in LiFePO 4 solid-state batteries. Graphical abstract
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高影响因子
RARE METALS
·
2018
·Vol. 37
·期 6
·488-496
·
IF 1.5
He Zi-Jian,Fan Li-Zhen
High-performance solid polymer electrolyte (SPE) has long been desired for the next-generation high energy density and safe rechargeable lithium batteries. A SPE composed of 80 wt% lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), 20% poly(ethylene carbonate) (PEC) and a polyamide (PA) fiber membrane backbone was prepared by solution-casting method. This solid electrolyte exhibits quite high ionic conductivity and lithium ion transference number ( t + ), and excellent mechanical strength. The as-prepared solid electrolyte shows good wettability to porous electrodes during cycles, which is beneficial to form ionically conductive phase throughout porous electrodes. All-solid-state LiFePO 4 |Li cells assembled with the as-prepared solid electrolyte deliver a high initial discharge specific capacity of 125.7 mAh·g −1 and good cycling stability at 55 °C (93.4% retention at 1C after 200 cycles), and superior cycle performance. Outstanding electrochemical performance can be mainly ascribed to the improved ionic conductivity in the entire porous electrodes due to the good wettability of SPE.
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高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Zhoufei Yang,Jin Wang,Chaojie Cui,Ying Jin,Gang Zhang,Henghui Zhou,Weizhong Qian
Compared with aluminum foil (Al foil), the three-dimensional (3D) aluminum foam (Al foam) has the characteristics of 3D interconnected metal wires and through-hole structure with high specific surface area, which exhibits great potential for application in high-power energy storage devices. In this work, 3D Al foam-based and Al foil-based cathode sheets were fabricated and assembled into pouch cells. In-situ XRD was employed to analyze the electrochemical reaction behavior of the two types of porous electrodes . The 3D Al foam-based cathode demonstrated faster electron transfer and lithium-ion diffusion as compared to the Al foil-based electrode, which is helpful for a uniform electrochemical reaction and decreases the electrochemical polarization. Electrochemical simulations and porous electrode models were built to understand these phenomena. The Al foam-based LiFePO 4 batteries exhibit much better power and energy performance than Al foil-based LiFePO 4 battery. The power density of the Al foam pouch cells is 7.0–7.7 kW/L when the energy density is 230–367 Wh/L, which is the highest power and energy density among reported Al foam-based devices. The new findings open up opportunities for the development of high-power and high-energy-density commercial batteries.
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高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Ziqi Guo,Weiwei Jiang,Chang-Zhong Liao,Chung-Kai Chang,Cunlei Zou,Wanyu Ding,Yong-Mook Kang,Jiliang Zhang
The chemical reaction of transition-metal oxides with Li ions can give much higher capacities than the intercalation of the commercial graphite in Li-ion batteries (LIBs). Yet, its lithiation process is usually oversimplified as a typical conversion reaction regardless of crystal structures of transition-metal oxides. Herein, we investigate the electrochemical performance of hexagonal NiO compared with the commonly used cubic NiO and other transition-metal oxides. Neither Li intercalation nor phase transformation is observed while hexagonal NiO starts to be lithiated, unlike other transition-metal oxides. Therein, the initial lithiation activates a conversion reaction confined to its surface producing ultrafine crystallites of ca. 5 nm. The unreacted NiO core does not maintain its single crystalline nature but forms the uniformly orientated crystallites . Further lithiation continues to reduce the size of the inner crystallites , accompanied by the formation of solid-electrolyte interface layers and loss of orientation. Complete lithiation yields ultrafine crystallites , and then this morphology is maintained during the following delithiation and subsequent cycles. This structural evolution inspires that the core-shell conversion reaction of transition-metal oxides enables their electrochemical stability to be extensively enhanced paving a novel way to properly manipulate the merit of conversion reaction in transition-metal oxides for the anode of LIBs.
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高影响因子
CHINESE CHEMICAL LETTERS
·
2018
·
IF 2.631
Feng Chen,Long Wu,Zeping Zhou,Jiajun Ju,Zhengping Zhao,Mingqiang Zhong,Tairong Kuang
Lignin is the most abundant and important macromolecule in organic matter and its yield is second only to cellulose. Lignin is abundant in source, low in price, and has a large number of active groups such as methoxy group and carboxyl group, so it has great utilization value. We used lignin as a carbon source to prepare porous carbon nanosphere (PCN) materials, and in-situ synthesized the MoS 2 on its surface. The high specific surface area (∼462.8 m 2 /g), large pore volume and good electron conductivity of the porous carbon scaffold facilitated the reversible electro-chemical reaction of S towards metallic Li, and thus the nano-hybrid showed a high specific energy and excellent cycle stability which still remained 520 mAh/g after 50 cycles.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Shuzhang Niu,Si-Wei Zhang,Donyang Li,Xin Wang,Xiaomei Chen,Run Shi,Nan Shen,Mengtian Jin,Xian Zhang,Qing Lian,Runqing Huang,Abbas Amini,Yusheng Zhao,Chun Cheng
Constructing a multi-functionally artificial interphase layer is an emerging strategy to possibly address the issues of inhomogeneous Lithium (Li) nucleation and dendrite growth. In this study, a silver@fullerene (Ag@C 60 ) interphase layer with lithiophilic-lithiophobic gradient was designed, which was fabricated by series of deposition of silver and fullerene (Ag@C 60 ) on Cu foam current collector (ACCF). In this way, the typically uncontrolled Li deposition process will become a highly nucleation-guided process, due to the preferentially induced Li nucleation of Ag nanoparticles, which will guide the Li deposition sandwiched in C 60 and Ag layers. While the top lithiophobic fullerene layer is beneficial for regulating uniform Li-ion flux and facilitating the formation of LiF-rich SEI layer, finally suppressing the top deposition of Li metal, due to the high nucleation energy barrier on fullerene. Consequently, Li@ACCF exhibits a low overpotential of 14 mV and an ultra-stable cyclic life for more than 2500 h in symmetric cells. Besides, it also displays excellent long-term cycle life and high-rate performance in lithium-metal full cells. This deliberate design of the “push–pull” Li could ensure the uniform Li deposition sandwiched fullerene and silver layers and provide a feasible and efficient approach to advance the practical use of lithium-metal anodes for high-energy–density batteries.
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高影响因子
危险品化学品经营许可证（带存储）