ADVANCED FUNCTIONAL MATERIALS
·
2018
·Vol. 28
·期 13
·1706513
·
IF 13.325
Xuyan Ni,Tao Qian,Xuejun Liu,Na Xu,Jie Liu,Chenglin Yan
The “shuttle effect” that stems from the dissolution of polysulfides is the most fatal issue affecting the cycle life of lithium-sulfur (Li–S) batteries. In order to suppress the “shuttle effect,” a new strategy of using a highly lithium ion conductive lithium fluoride/graphene oxide (LiF/GO) solid electrolyte interphase (SEI) to mechanically prevent the lithium dendrite breakthrough is reported. When utilized in Li–S batteries, the LiF/GO SEI coated separator demonstrates significant feature in mitigating the polysulfide shuttling as observed by in situ UV–vis spectroscopy. Moreover, the restrained “shuttle effect” can also be confirmed by analysis of electrochemical impedance spectroscopy and characterization of lithium dendrites, which indicates that no insulating layer of solid Li 2 S 2 /Li 2 S is found on lithium anode surface. Furthermore, the LiF/GO SEI layer puts out good lithium ion conductivity as its lithium ion diffusion coefficient reaches a high value of 1.5 × 10 −7 cm 2 s −1 . These features enable a remarkable cyclic property of 0.043% of capacity decay per cycle during 400 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2016
·Vol. 22
·期 12
·2273-2280
·
IF 2.119
Zhang Qingtang,Xie Xiaolong,Fan Weifeng,Wang Xiaomei
A novel facile approach to coat LiMn 2 O 4 by lithium polyacrylate (PAALi) is demonstrated. The PAALi-coated LiMn 2 O 4 (LMO@2%PAALi) and LiMn 2 O 4 (LMO) are characterized by charge–discharge tests, X-ray diffraction (XRD), PAALi dissolving experiment, transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), thermogravimetry (TG), and inductively coupled plasma optical emission spectrometer (ICP-OES). XRD and FTIR analyses indicate that there are no clear differences between LMO@2%PAALi and LMO. PAALi dissolving experiment indicates that PAALi is indissolvable in LiPF 6 -EC/DMC/EMC electrolyte. TEM results reveal that LiMn 2 O 4 particles are coated by PAALi. ICP-OES results indicate that this stable PAALi coating can prevent the Mn ions dissolving from active LiMn 2 O 4 materials and then the stability of LiMn 2 O 4 crystals in electrolyte are greatly enhanced. These unique features ensure that LMO@2%PAALi possesses much better rate performance, higher discharge capacity, better cycling performance, and lower charge transfer resistance over LMO. The discharge capacity of LMO@2%PAALi at 0.2 C reaches up to 127.2 mAh g −1 at room temperature.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Carbon Energy
·
2022
·Vol. 5
·期 6
·e282
·
IF 21.556
Jian Lu,Yun Zhao,Yuqiong Kang,Chenglei Li,Yawen Liu,Liguang Wang,Hao Du,Meicen Fan,Yunan Zhou,John Wozny,Tao Li,Naser Tavajohi,Feiyu Kang,Baohua Li
It is challenging to efficiently and economically recycle many lithium-ion batteries (LIBs) because of the low valuation of commodity metals and materials, such as LiFePO 4 . There are millions of tons of spent LIBs where the barrier to recycling is economical, and to make recycling more feasible, it is required that the value of the processed recycled material exceeds the value of raw commodity materials. The presented research illustrates improved profitability and economics for recycling spent LIBs by utilizing the surplus energy in lithiated graphite to drive the preparation of organolithiums to add value to the recycled lithium materials. This study methodology demonstrates that the surplus energy of lithiated graphite obtained from spent LIBs can be utilized to prepare high-value organolithiums, thereby significantly improving the economic profitability of LIB recycling. Organolithiums (R–O–Li and R–Li) were prepared using alkyl alcohol (R–OH) and alkyl bromide (R–Br) as substrates, where R includes varying hindered alkyl hydrocarbons. The organolithiums extracted from per kilogram of recycled LIBs can increase the economic value between $29.5 and $226.5 kg −1 cell. The value of the organolithiums is at least 5.4 times the total theoretical value of spent materials, improving the profitability of recycling LIBs over traditional pyrometallurgical ($0.86 kg −1 cell), hydrometallurgical ($1.00 kg −1 cell), and physical direct recycling methods ($5.40 kg −1 cell).
研究领域:
材料科学
·
能源化学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale Research Letters
·
2022
·Vol. 17
·期 1
·1-10
·
IF 5.418
Zhang Li,Jiao Yu,Wang Fan,Zhou Mingjie,Hu Yin,Yan Yichao,Li Fei,Lei Tianyu,Chen Bo,Chen Wei
Lithium–sulfur (Li–S) cells have been regarded as attractive alternatives to achieve higher energy densities because of their theoretical specific energy far beyond the lithium-ion cells. However, the achieved results of Li–S cells are exaggerating the cycle performance in their pouch formats because the considerable works are based on the coin cells where flood electrolyte and endless Li supply ensure the Li metal with nature structure features, resulting in a negligible effect on cycle performance caused by the Li dendrites and electrolyte dissipation during cycles. Herein, we demonstrate a strategy to enable the Li metal with lithium fluoride (LiF)-rich solid electrolyte interface via integrating a reinforced interface (RI) embedded with nano-LiF particles on the surface of the Li metal anode. The RI interface enables the solvent molecules of the electrolyte to gain fewer electrons from Li anode, resulting in a lower leakage current of assembled RI||Li–S cell (~ 0 μA) than pristine Li anode (~ 1.15 µA). Moreover, these results show that suppressing lithium dendrite growth is more urgent than inhibiting the shuttle effect of polysulfides in the pouch cell format. As a result, the RI layer-engineered Li metal bears witness to the cyclic stability of Li anode over 800 h, thus achieving stable cycles of Ah-scale Li–S pouch cell with an energy density of 410 Wh/kg at a current of 200 mA per cell. Our study demonstrates that the suppression of lithium dendrites by the RI could be a promising method to prolong the cycle number of Li–S pouch cells.
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
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Zhaoyu Zhang,Yufei Zhang,Minghui Ye,Yongchao Tang,Xiaoqing Liu,Cheng Chao Li
SiO x /C composites are highly potential anode alternatives for next-generation lithium-ion batteries (LIBs) owing to their low cost and high theoretical capacity. However, the sluggish lithium-ion diffusion kinetics severely limit their practical capacity and rate performance. Herein, a high-capacity and high-rate anode based on commercial SiO x /C is facilely achieved by in situ constructing a Li + conductive interphase (LCI) to simultaneously boost the transport efficacy of Li + ions and buffer the volume expansion. The as-designed, LCI-protected SiO x /C anode delivers an exceptionally high capacity of 1420.9 mAh g −1 at 0.2 A g −1 , excellent rate performance (91.4% capacity retention from 0.2 A g −1 to 1 A g −1 ) and long cycling stability, substantially outstripping the pristine SiO x /C counterpart and most recently reported Si-based electrodes. More importantly, taking advantages of the fast and stable lithiation/delithiation processes, this electrode can also be adapted to further applications at large current densities (766.44 mAh g −1 at 5 A g −1 ) or high mass loadings (5.02 mAh cm −2 at 0.1 A g −1 , ∼3.5 mg cm −2 ). A full battery with satisfactory electrochemical performance is also demonstrated. The strategy of building ion conductive interphase to subtly tailor the transport behavior of Li + ions is anticipated to unlock the practical deployment of Si-based LIBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qi Yang,Pengfei Ren,Guangming Cai
The demand for high energy density and safety has significantly promoted the development of all-solid-state lithium metal batteries. However, their practical use has been limited by the solid-solid interface and thermodynamic stability between lithium metal and solid electrolytes (SEs). Here, we constructed a hybrid interface via a thermal welding strategy to achieve stable cycling. Specifically, a dense and robust AlF 3 interface layer was constructed on the surface of the lithium metal via pressing and heat treatment. The lithiation products Li-Al alloy and LiF can effectively improve the interface contact and inhibit the growth of lithium dendrites. As a result, the critical current density (CCD) of the Li/Li symmetric cell significantly improved from 0.8 to 3.3 mA cm −2 , and the cycling life was dramatically increased to 6000 h at a high current density of 0.4 mA cm −2 . Moreover, the hybrid interface enabled stable cycling of both Li/Li symmetric and LiNi 0.6 Mn 0.2 Co 0.2 O 2 /Li cells even at high current densities. The modified layer material had been diversified to SnF 2 , ZnF 2 , and MgF 2 , thus supporting the general concept of thermal activation strategy. Such a design can be extended to other solid-state devices for better functioning and extended cycle life.
研究领域:
材料科学
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储能
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电化学
·
全固态电池
·
界面工程
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2024
·
IF 18.9
Cong Dong,Haodong Shi,Hantao Cui,Shengwei Yu,Yuejiao Li,Yuxin Ma,Yunna Guo,Yanfeng Dong,Liqiang Zhang,Chunzhong Li,Yan Yu,Zhong-Shuai Wu
All-solid-state lithium-sulfur batteries (ASSLSBs) are highly sought after due to their inherent high energy density. However, the low stability of lithium metal with solid-state- electrolytes (SSEs) and the severe problem of lithium dendrites limit the lifespan of ASSLSBs. Here, we propose a large-area, ultrathin, and free-standing Li-rich anode (3D Li-Sn alloy/GF) for ASSLSBs, featuring a Li-Sn alloy foil (10–50 μm in thickness) supported by a three-dimensional (3D) graphene framework (GF). The high strength and 3D continuous structure of graphene ensure stable contact at the anode/SSE interface during delamination. Thanks to its high specific surface area, lithiophilic Li 22 Sn 5 nucleation sites can be uniformly distributed within the alloy phase, making lithium ions preferentially deposit towards the interior of the phase during lithium plating. The obtained lithium-rich alloy anode demonstrates an ultra-high lithium content (3282 mAh g −1 ) and a low potential platform (0.03 V vs. Li/Li + ), ensuring high energy density. This results in a long lifespan of up to 1200 h and a high critical current density of 4 mA cm −2 . The ASSLSBs exhibit excellent room-temperature cycling stability, with a capacity retention rate of 97.8 % after 235 cycles. Even with a high sulfur loading of 3.53 mg cm −2 , the anode maintains a high areal capacity of >3 mAh cm −2 , showcasing its potential for safe, long-life, high-energy-density ASSLSBs.
研究领域:
材料科学
·
储能
·
电化学
·
纳米技术
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电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Li-Peng Hou,Xi-Yao Li,Chen-Xi Bi,Zi-Xian Chen,Zheng Li,Li-Ling Su,Peng Shi,Cheng-Bin Jin,Bo-Quan Li,Jia-Qi Huang,Xue-Qiang Zhang,Qiang Zhang
Long-cycling practical lithium–sulfur batteries are hindered by the parasitic reactions between lithium polysulfide (LiPS) intermediates and lithium metal anodes . Solid electrolyte interphase (SEI) on lithium metal anodes plays a crucial role in shielding the parasitic reactions of LiPSs. Herein, a lithium oxysulfide-rich SEI is demonstrated to shield polysulfides for stabilizing lithium metal anodes in working lithium–sulfur batteries. Li 2 SO 4 is sustainably released as an additive to introduce abundant lithium oxysulfide components, such as sulfates, sulfites , and other Li 2 S x O y in SEI. The lithium oxysulfide-rich SEI effectively shields the parasitic reactions of LiPSs and the lifespan of lithium–sulfur batteries increases by 60% under demanding conditions of ultrathin Li anodes (50 μm) and high-loading S cathodes (4.0 mg cm −2 ). Furthermore, a practical 2.59 Ah lithium–sulfur pouch cell with the lithium oxysulfide-rich SEI delivers 25 cycles with an initial specific energy of 352 Wh kg −1 . This work provokes insights into the role of lithium oxysulfide in SEI and inspires rational regulation of SEI to stabilize lithium–sulfur batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Minghua Li,Deli Xu,Guoxian Wu,Sheng Wang,Hao Cheng,Jianshu He,Kangzhe Yu,Zhihan Liu,Yaqing Zhou,Bingbing Tian
All-solid-state lithium batteries (ASSLBs) have attracted significant attention due to their advantages of high energy density, enhanced safety profile, and potential for cost-effective manufacturing. At the same time, a superior anode that matches the ASSLBs is particularly important. In this work, we demonstrated chemically prelithiated MoS2 as an anode material for ASSLBs, which embeds lithium ions into a MoS2 matrix (LixMoS2) in advance to counteract lithium loss during the cycling. By a combination of LixMoS2, Li6PS5Cl (LPSC), and Li–In alloy, an all-solid-state lithium battery with superior long-term cycling and rate capability has been achieved. The cells exhibited a capacity retention rates of 93.4 and 90.8% after 100 cycles at both 0.2 and 1C, alongside a high specific discharge capacity of 480 mAh g–1 at 1C. Furthermore, when paired with a LiCoO2 (LCO) cathode, the full cell maintained a capacity retention rate of 95% over 300 cycles at 1C, with an average capacity loss of only 0.013 mAh g–1 per cycle. This work offers a feasible strategy for optimizing anode materials within sulfide-based ASSLBs, providing valuable insights for the development of high-performance ASSLBs for practical applications.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Junlong Feng,Le Hu,Xiaowei Wu,Ziqin Liu,Kaiquan He,Pu Hu,Chaoqun Shang
The uncontrollable Li dendrite accumulation accompanied by low Coulombic efficiency severely hampers the sustainable and practical application of lithium metal batteries (LMBs). To tune the uneven Li + flux caused by irregular pores on commercial separator and realize modulated Li + plating/stripping behaviors, in this work, we report the modification of commercial polypropylene separator with etched Co/Fe-based Prussian blue analogue (PP@PBA-X, X represents the HCl etching time). The optimal PBA-4 with acid etching for 4 h possesses regulated micro-/meso-/macro-porous structure, which ensures homogeneous Li + flow of PP@PBA-4 with high Li + transference number of 0.76 and further hinders the growth of Li dendrites. With the assistance of PP@PBA-4, the Li||Li cell shows stable cycling performance for 500 h at 1 mA cm −2 with fixed specific capacity of 1 mAh cm −2 , while the full Li-S battery with limited Li supply delivers favorable cycling stability for almost 430 cycles with 60 % capacity retention and high Coulombic efficiency of 99.95 % at current density of 500 mAg −1 .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2022
·
IF 20.831
Yunrui Zhang,Wenbo Wang,Meiling Hou,Yantao Zhang,Yaying Dou,Zehua Yang,Xiaoyang Xu,Haining Liu,Shanlin Qiao
Li metal batteries have won the fame for the enlarged cell potential and higher theoretical specific capacity. Nevertheless, the commercial implementation is still confronted with inevitable Li dendritic growth and depressed Coulombic efficiency. The Li + transfer behavior is the vital factor to ameliorate the durability of solid electrolyte interphase (SEI). Herein, a self-exfoliated TpTG covalent organic framework (COF) was developed to construct an artificial SEI film. The versatile cationic-skeleton of TpTG could spontaneously drive the formation of nano-mesh with thickness of 3∼6 nm, and facilitate uniform dispersibility on the Li metal surface. Moreover, the 7 Li solid-state nuclear magnetic resonance spectra, Fourier-transform infrared spectra, and density functional theory calculations have identified the energetic lithiophilicity and TFSI – repulsion features. The Cl – coordinated TpTG endowed with abundant lithiophilic sites can reconfigure the charge distribution and expedite the uniform Li + migration adjacent to the electrode|electrolyte interface. The uniform Li + flux distribution redounds to reversible lithium stripping/plating and tames the dendrite formation especially at high-rate protocols. The overwhelming evidences of lower polarization, prolonged lifespan, and compact Li deposition, corroborate the practicability of self-exfoliated TpTG to achieve the goal of high-energy-density Li metal batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2024
·
IF 2.6
Guo Zhijie,Wang Fei,Zhang Xinyao,Chen Sihan,Wang Xinyao,Liang Ye,Zhang Liang,Zhao Xianyi
The poor lithium ion conductivity of solid electrolyte interface (SEI) layer limits the improvement of cycling performance of lithium metal batteries. Here, we pre-designed a Li 2 S/Li 2 S 2 inorganic layer to participate into the formation of SEI through a simple one-step melting sulfur strategy. Its high ionic conductivity promotes the rapid and uniform transmission of lithium ion, and effectively inhibits the side reaction and the growth of lithium dendrites. Benefiting from these advantages, Li/Li symmetrical batteries using artificial SEI with Li 2 S/Li 2 S 2 show small polarization voltages (25–40 mV), and can run for nearly 1500 h, which is 2 times than that of bare lithium. Moreover, the application of Li/LiFePO 4 battery can be extended to 235 cycles with a high capacity retention of 90% under high load of 21.6 mg cm −2 and lean electrolyte of 2 µL mg −1 .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）