ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Yicheng Zhong,Yuanmao Chen,Yifeng Cheng,Qinglu Fan,Huajun Zhao,Huaiyu Shao,Yanqing Lai,Zhicong Shi,Xi Ke,Zaiping Guo
Lithium metal anodes (LMAs) are critical for high-energy-density batteries such as Li–S and Li–O2 batteries. The spontaneously formed solid electrolyte interface on LMAs is fragile, which may not accommodate the cyclic Li plating/stripping. This usually will result in a low coulombic efficiency (CE), short cycle life, and potential safety hazards induced by the uncontrollable growth of lithium dendrites. In this study, we fabricate a Li alginate-based artificial SEI (ASEI) layer that is chemically stable and allows easy Li ion transport on the surface of LMAs, thus enabling the stable operation of lithium metal anodes. Compared to bare LMAs, the ASEI layer-protected LMAs exhibit a more stable Li plating/stripping behavior and present effective dendrite suppression. The symmetric Li∥Li cells with the ASEI layer-protected LMAs can stably run for 850 and 350 h at current densities of 0.5 and 1 mA cm–2, respectively. Additionally, the LiFePO4∥Li full cell with the ASEI layer-protected LMA exhibits a capacity retention of about 94.0% coupled with a CE of 99.6% after 1000 cycles at 4 C. We believe that this study of engineering an ASEI brings a new and promising approach to the stabilization of LMAs for high-performance lithium metal batteries.
研究领域:
材料科学
·
电化学
·
能源存储
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 9
·6626-6630
·
IF 3.201
Ye Yuan,Bo Wang,Rensheng Song,Fei Wang,Hao Luo,Tiantian Gao,Dianlong Wang
A LiFePO4 (LFP)/lithium polysulfide (Li2Sn) hybrid system was designed using a LFP cathode and a Li2Sn-added electrolyte to improve the Li-ion storage performance. In the LFP cathode, a commercial LFP product was introduced as the active material. And the Li2Sn-added electrolyte was prepared through a facile liquid-phase process. Benefiting from the synergistic effect for energy-storage between the LFP component and the Li2Sn component, the designed LFP/Li2Sn hybrid system exhibited a large specific capacity (439 mA h g−1 at 0.2C), good rate performance (323 mA h g−1 at 2C) and stable cycling property (82% capacity retention over 200 cycles). It is believed that the designed LFP/Li2Sn hybrid system and the proposed hybrid energy-storage concept could advance the development of electrochemical energy storage.
研究领域:
电化学
·
材料科学
·
能源存储
·
电池技术
·
纳米材料
·
固态离子学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Xin Dong,Ziqin Liu,Kaiquan He,Pu Hu,Chaoqun Shang
Li metal is a potential anode material for the next generation high-energy–density batteries because of its high theoretical specific capacity. However, the inhomogeneous lithium dendrite growth restrains corresponding electrochemical performance and brings safety concerns. In this contribution, the Li 3 Bi/Li 2 O/LiI fillers are generated by the in-situ reaction between Li and BiOI nanoflakes, which promises corresponding Li anodes (BiOI@Li) showing favorable electrochemical performance. This can be attributed to the bulk/liquid dual modulations: (1) The three-dimensional Bi-based framework in the bulk-phase lowers the local current density and accommodates the volume variation; (2) The LiI dispersed within Li metal is slowly released and dissolved into the electrolyte with the consumption of Li, which will form I − /I 3 − electron pair and further reactivate the inactive Li species. Specifically, the BiOI@Li//BiOI@Li symmetrical cell shows small overpotential and enhanced cycle stability over 600 h at 1 mA cm −2 . Matched with an S-based cathode, the full Li-S battery demonstrates desirable rate performance and cycling stability.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
固态离子学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Weize Jin,Tao Zhou,Zhaolei Wang,Wenwen Xue,Chun Feng,Fang Zhang,Xiaoyu Huang,Dong Yang,Patrick Théato,Yongjun Li
Covalently grafting redox-active polymer to graphene sheets is a practical approach for developing high-performance organic cathode materials . Here, we report a facile preparation of radical polymer poly(2,2,6,6-tetramethylpiperidin-1-oxyl-4-yl methacrylate) (PTMA) grafted graphene sheets (rGO) composites (rGO- g -PTMA) with various PTMA contents via one-step radical polymerization , and their applications as cathodes for Li-ion/Na-ion batteries. The energy storage capacity of rGO- g -PTMA is determined by the relative contribution from the battery-type redox reaction of PTMA and the pseudocapacitive behavior of rGO sheets. The optimized rGO- g -PTMA 50 composite with 50 wt% of PTMA shows excellent energy storage performance, which is almost two times higher than that of the physically blended rGO/PTMA 50 owing to reduced solubility of PTMA in electrolyte solution and improved electrical conductivity . As cathode materials for Li-ion/Na-ion batteries, rGO- g -PTMA 50 shows superior performance including high capacity, good cycling and rate stability. Hence, this covalently bonded radical polymers on graphene provide new option for developing high-performance organic cathode materials for Li-ion/Na-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
高分子化学
·
电池技术
✓ 已验证
DOI
高影响因子
CARBON
·
2019
·
IF 7.466
Hao Yang,Cuimei Fu,Yijian Sun,Lina Wang,Tianxi Liu
Olivine-type LiMnPO 4 (LMP) cathodes have gained enormous attraction for Li-ion batteries (LIBs) due to high discharge platform, theoretical capacity and thermal stability. However, it is still challenging to achieve encouraging Li-storage behavior owing to the low electronic conductivity and slow Li-ion diffusion rate of LMP. Here, the electrochemical behavior of fibrous LiFe x Mn 1-x PO 4 @carbon (LF x M 1-x P@C, x = 0, 0.25, 0.5, 0.75, 1) composites with different Fe doping amounts is investigated. Among the composites, LF 0.5 M 0.5 P@C demonstrates a superior cell performance due to a higher Li-ion diffusion coefficient (D Li ), resulting from a proper Fe doping ratio and a more uniform morphology. At a current rate of 0.2 C (1 C = 170 mA g −1 ), the LF 0.5 M 0.5 P@C cathode delivers a specific capacity of 150 mAh g −1 up to 500 cycles with a capacity retention of 119%. A longer-term cycling at 5 C for 2000 cycles can be maintained with a reversible capacity exceeding 102 mAh g −1 . The fundamental study provides an insightful guidance for future design of cathode materials with high performance.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Qiang Lv,Yajie Song,Bo Wang,Shangjie Wang,Bochen Wu,Yutong Jing,Huaizheng Ren,Shengbo Yang,Lei Wang,Lihui Xiao,Dianlong Wang,Huakun Liu,Shixue Dou
Solid polymer electrolytes (SPEs) are one of the most promising alternatives to flammable liquid electrolytes for building safe Li metal batteries. Nevertheless, the poor ionic conductivity at room temperature (RT) and low resistance to Li dendrites seriously hinder the commercialization of SPEs. Herein, we design a bifunctional flame retardant SPE by combining hydroxyapatite (HAP) nanomaterials with N-methyl pyrrolidone (NMP) in the PVDF-HFP matrix. The addition of HAP generates a hydrogen bond network with the PVDF-HFP matrix and cooperates with NMP to facilitate the dissociation of LiTFSI in the PVDF-HFP matrix. Consequently, the prepared SPE demonstrates superior ionic conductivity at RT, excellent fireproof properties, and strong resistance to Li dendrites. The assembled Li symmetric cell with prepared SPE exhibits a stable cycling performance of over 1200 h at 0.2 mA cm −2 , and the solid-state LiFePO 4 ||Li cell shows excellent capacity retention of 85.3% over 600 cycles at 0.5 C.
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产品关联
DOI
高影响因子
DESALINATION
·
2023
·
IF 9.9
Tingyu Li,Xinzhu Zhang,Yu Zhang,Jixiao Wang,Zhi Wang,Song Zhao
Selective lithium recovery from salt lake brine using emerging nanofiltration membranes is expected to solve the insufficient supply of lithium resources. In this work, 1,4,7,10-tetraazacyclododecane (Cyclen) was employed as a novel structural regulator through interfacial polymerization of polyethyleneimine (PEI) and trimesoyl chloride (TMC) to develop polyamide NF membrane with efficient Li + /Mg 2+ separation performance. After the introduction of Cyclen to aqueous phase , the PEI/Cyclen-TMC selective layer was confirmed to possess a higher crosslinking degree and larger d-spacing than PEI-TMC layer, endowing a dedicated channel for Li + transport. The water permeance of PEI/Cyclen-TMC composite membrane reached 14.0 L·m −2 ·h −1 ·bar −1 , about 3.8 times higher than PEI-TMC composite membrane, and meanwhile the separation factor ( S Li,Mg ) could be stabilized as 8.7 to realize a considerable reduction of Mg 2+ /Li + mass ratio from 20 to 2.3. Additionally, PEI/Cyclen-TMC composite membrane was utilized to operate a three-stage nanofiltration treatment procedure of a simulated salt lake brine (Mg 2+ /Li + mass ratio: 40). The results indicated that Li + could be efficiently retracted to obtain a solution with 19.5 mg·L −1 Li + and Mg 2+ /Li + mass ratio of 0.3. After the subsequent precipitation and filtration, the obtained Li 2 CO 3 purity could reach 93 %, indicating the potential application of nanofiltration for lithium recovery.
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Mengyuan Song,Changhao Tian,Chunguang Chen,Tao Huang,Aishui Yu
Lithium-oxygen batteries show great energy storage potential due to their high energy density . However, it is difficult for conventional liquid electrolytes to form a stable solid electrolyte interface (SEI) on cathode surface to ensure long-term stable cycling of lithium-oxygen batteries . Herein, LiBOB is added to the LiTFSI-based electrolyte to solve the above-mentioned problems. By introducing LiBOB into LiTFSI single-salt electrolyte system, the electron delocalization of the BOB − anion induces the dissociation equilibrium of the lithium salt to occur positively and the formed electrolyte exhibits good ionic conductivity . Different amounts of LiBOB show different characteristics in electrochemical performance. Trace amounts of LiBOB as an additive increase the solvation of Li + and improve the discharge capacity of the cell. Furthermore, the synergistic effect of the LiTFSI-LiBOB dual-salt electrolyte forms a protective SEI when LiBOB has a larger proportion of lithium salts in the electrolyte, resulting in comparable cycling performance. This work demonstrates a promising approach to design electrolytes for long-term stable cycling of lithium-oxygen batteries.
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产品关联
DOI
高影响因子
Nano Research
·
2023
·Vol. 16
·期 7
·9344-9351
·
IF 9.9
Zeng Zhichao,Shi Xiaomeng,Sun Mingzi,Zhang Hongtu,Luo Wei,Huang Yunhui,Huang Bolong,Du Yaping,Yan Chun-Hua
Rare-earth (RE) halide solid electrolytes (HSEs) have been an emerging research area due to their good electrochemical and mechanical properties for all-solid-state lithium batteries (ASSBs). However, only very limited types of HSEs have been reported with high performance. In this work, tens of grams of RE-HSE Li 3 TbBr 6 (LTbB) was synthesized by a vacuum evaporation-assisted method. The as-prepared LTbB displays a high ionic conductivity of 1.7 mS·cm −1 , a wide electrochemical window, and good formability. Accordingly, the assembled solid lithium-tellurium (Li-Te) battery based on the LTbB HSE exhibits excellent cycling stability up to 600 cycles, which is superior to most previous reports. The processes and the chemicals during the discharge/charge of Li-Te batteries have been studied by various in situ and ex situ characterizations. Theoretical calculations have demonstrated the dominant conductivity contributions of the direct [octahedral]-[octahedral] ([Oct]–[Oct]) pathway for Li ion migrations in the electrolyte. The Tb sites guarantee efficient electron transfer while the Li 2s orbitals are not affected during migration, leading to a low activation barrier. Therefore, this successful fabrication and application of LTbB have offered a highly competitive solution for solid electrolytes in ASSBs, indicating the great potential of RE-based HSEs in energy devices.
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产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 35
·期 33
·2302325
·
IF 29.4
Chang Guo,Fuli Zhang,Xiao Han,Lipeng Zhang,Qian Hou,Lele Gong,Jincheng Wang,Zhenhai Xia,Jianhua Hao,Keyu Xie
To date, the effect of noble metal (NM) electronic structures on CO 2 reaction activity remains unknown, and explicit screening criteria are still lacking for designing highly efficient catalysts in CO 2 -breathing batteries. Herein, by preferentially considering the decomposition of key intermediate Li 2 CO 3 , an intrinsic descriptor constituted of the d x 2 − y 2 ${{\rm{d}}}_{{x}^2 - {y}^2}$ orbital states and the electronegativity for predicting high-performance cathode material are discovered. As a demonstration, a series of graphene-supported noble metals (NM@G) as cathodes are fabricated via a fast laser scribing technique. Consistent with the preliminary prediction, Pd@G exhibits an ultralow overpotential (0.41 V), along with superior cycling performance up to 1400 h. Moreover, the overall thermodynamic reaction pathways on NM@G confirm the reliability of the established intrinsic descriptor. This basic finding of the relationship between the electronic properties of noble metal cathodes and the performance of Li-CO 2 batteries provides a novel avenue for designing remarkably efficient cathode materials for metal-CO 2 batteries.
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xin Jiang,Junwei Zhou,Xinke Zhong,Zhaopeng Hu,Rongyan Hu,Yihu Song,Qiang Zheng
Electromagnetic interference (EMI) shielding materials with stretchability are important for developing wearable and flexible appliances. Herein, lithium bis(trifloromethanesulfonyl)imide (Li-TFSI)-doped poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) and carboxylated styrene-butadiene rubber (XSB) latex are used to prepare stretchable EMI shielding composite films of 0.2 mm in thickness. In these films, the doped PEDOT:PSS nanoparticles form tenuous conductive pathways between the hexagonally packed latex particles, resulting in higher EMI shielding efficiency (EMI SE) compared with the films containing traditional dopant ethylene glycol. For the purpose of stretchable EMI shielding, the films containing 6 wt % PEDOT:PSS and 6 wt % Li-TFSI demonstrate EMI SE of 50 and 30 dB (12.4 GHz) at 0 and 100% strains, respectively, being the highest values among the reported shielding composites except for those using liquid metal as the filler. The investigation also provides a simple and environmentally friendly preparation method being highlighted for the development of lightweight stretchable EMI shielding materials for applications in flexible electronics in the near future.
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2022
·
IF 6.267
Yun Zhang,Xiaoning Li,Shihua Ding,Tianxiu Song,Zezhen Yin,Jiaying Dan
Ba 1- x Li x Si 2 O 5- x /2 ( x = 0–0.5) ceramics were prepared by solid-state reaction method. The occupation tendency of Li + was well explained based on First-principle calculation and unit cell volume changes. Li + non-equivalent substitution for Ba 2+ considerably reduced the sintering temperature to 975 °C, in comparison with 1225 °C for pure BaSi 2 O 5 . Single phase solid solution with orthorhombic structure was observed with x = 0–0.1. Nevertheless, trace amounts of unexpected secondary phases Li 2 Si 2 O 5 and SiO 2 were detected for higher Li-containing samples. Notably, the Q×f significantly enhanced up to 58.16% from 16,134 GHz ( x = 0) to 25,518 GHz ( x = 0.01), which predominantly depended on the structural characteristics, such as packing fraction and bond covalence. Increase x from 0 to 0.5 led to the reduction of dielectric constant ε r from 7.11 to 5.95. The resonant frequency temperature coefficient τ f was directly dominated by oxygen bond valence ( V O ), rather than V Ba and V Si . Ba 0.99 Li 0.01 Si 2 O 4.995 ceramic sintered at 1050 °C for 4 h exhibited a high Q×f value of 25,518 GHz, and the ε r and τ f values were 6.94 and −29.46 ppm/°C, respectively.
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产品关联
DOI
高影响因子
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