Journal of Energy Chemistry
·
2024
·
IF 14
Yaning Liu,Tianqi Yang,Ruyi Fang,Chengwei Lu,Ruojian Ma,Ke Yue,Zhen Xiao,Xiaozheng Zhou,Wenkui Zhang,Xinping He,Yongping Gan,Jun Zhang,Xinhui Xia,Hui Huang,Xinyong Tao,Yang Xia
The unstable electrolyte/lithium (Li) anode interface has been one of the key challenges in realizing high energy density solid-state lithium metal batteries (LMBs) applications. Herein, a dense and uniform silver (Ag) nano interlayer with a thickness of ∼35 nm is designed accurately by magnetron sputtering technology to optimize the electrolyte/Li anode interface. This Ag nano layer reacts with Li metal anode to in-situ form Li-Ag alloy, thus enhancing the physical interfacial contact, and further improving the interfacial wettability and compatibility. In particular, the Li-Ag alloy is inclined to form AgLi phase proved by cryo-TEM and DFT, effectively preventing SN from continuously “attacking” the Li metal anode due to the lower adsorption of succinonitrile (SN) molecules on AgLi than that of pure Li metal, thereby significantly reinforcing the interfacial stability. Hence, the enhanced physical and chemical stability of electrolyte/Li anode interface promotes the homogeneous deposition of Li + and inhibits the dendrite growth. The Li-symmetric cell maintains stable operation for up to 1700 h and the cycling stability of LiFePO 4 |SPE|Li full cell is remarkably improved at room temperature (capacity retention rate of 91.9% for 200 cycles). This work opens an effective way for accurate and controllable interface design of long lifespan 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
·
纳米科技
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固体离子学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Tianyao Ding,Dong Zheng,Huainan Qu,Weixiao Ji,Xiaoxiao Zhang,Dongping Lu,Gongwei Wang,Deyang Qu
An in-situ electrochemical optical diagnosis is the key to the investigation of electrode interface during a redox reaction . Because the morphology changes particularly, dendrite formation, dendrite shapes, solid electrolyte interface formation and gas generation can be revealed visually. The challenge of ensuring uniform current density on a flat Li anode in a liquid electrolyte is addressed and uniform Li plating is demonstrated. The dendrite shape change under different reduction current density is discussed. The Li dendrite shape change and the performance of Li anodes with a surface lamination of graphite and red phosphate are used as examples to demonstrate the capability of the in-situ optical cell. An in-situ electrochemical optical cell used in the investigation of the increasingly popular solid-state Li batteries has its own challenges. Due to the untransparent nature of a solid-state electrolyte, an optical investigation on a solid-state electrolyte Li battery needs to be done by exposing the cross-section of the cell. In addition, it is very difficult to assemble an optical cell with a brittle and fragile solid-state electrolyte in a glove box. A set of formation and transfer dies, and an optical cell are introduced. The Li dendrite growth at the interface can be observed in a solid-state Li cell.
研究领域:
电化学
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材料科学
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能源存储
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固态电池
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界面科学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 21
·2201038
·
IF 19.924
Wen-Hao Li,Yue-Ming Li,Xin-Fang Liu,Zhen-Yi Gu,Hao-Jie Liang,Xin-Xin Zhao,Jin-Zhi Guo,Xing-Long Wu
Dual-ion batteries (DIBs) are a viable option for large-scale energy storage owing to their high energy density, low cost, and environmental friendliness. However, interfacial instability at both the cathode and anode in Li-graphite DIBs (LG-DIBs) contributes to poor cycling performance and failed energy storage, severely limiting their application potentials. Herein, a two-pronged strategy is used to improve the interfacial stability, synergistically stabilizing the graphite cathode by applying a rigid/inert surface coating while building a 3D framework on the lithium anode. The resultant LG-DIBs are ultrastable and achieve a long cycle life (capacity retention of 80% after 2700 cycles at 200 mA −1 ) in the all-climate temperature range from −25 to 40 °C. Ex situ characterization reveals that the cathode–electrolyte interphase on graphite is stabilized by suppressing the electrolyte decomposition and reducing graphite exfoliation. Simultaneously, the framework constructed on the lithium anode induces uniform and dendrite-free Li deposition owing to its 3D structure. This study not only contributes to the development of practical LG-DIBs but also points out a promising research direction for other new types of batteries.
研究领域:
储能
·
电化学
·
材料科学
·
电池技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Kejin Jiao,Shujie Liu,Yanyan Ma,Shuo Chen,Liying Wei,Jianhua Yan
Lithium (Li) metal battery is a promising next generation energy storage system due to its high energy density , but what hinders its commercialization is the safety hazard of Li-anode, especially under high current densities. Here, we report a dual strategy of using electronic conductive black TiO 2−x nanofiber films to construct composite Li-metal anodes with stable 3D networks and applying an in-situ polymerized ionic conductive gel-electrolyte to construct efficient quasi-solid-state Li-batteries (QSSLBs). The 3D nanofibrous Li-anode shows a stable and small nucleation barrier and can run stably (>1600 h) at a high current density of 10 mA/cm 2 . When matching with high-loading cathodes of LiFePO 4 , the QSSLBs exhibit excellent long-term cycling stability (>500 cycles) and high-rate capability (>1 C). In addition, the in-situ polymerization strategy can be incorporated with the commercial lamination manufacturing to produce 63-Ah pouch cells of LiFePO 4 ||graphite, which deliver a high initial Coloumbic efficiency, a large energy density at 0.3 C, excellent rate capability from 0.25 to 2 C, and long-term cycling performance at 0.3 and 1 C, showing potential commercial prospects.
研究领域:
能源存储
·
材料科学
·
电化学
·
电池技术
✓ 已验证
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
·
电池技术
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Jianwei Zhang,Yunyun Zhong,Shuanjin Wang,Dongmei Han,Min Xiao,Luyi Sun,Yuezhong Meng
Lithium (Li) as one of the most promising anode materials for the next-generation batteries was unfortunately plagued by the inevitable Li dendrite growth and the dynamically destroy/reconstruction of the unstable native solid electrolyte interphase (SEI) layer, which can severely affect the specific capacity and lifespan of lithium batteries, limiting the practical application of the Li anode. In this work, we designed a single ion conducting artificial polymer SEI layer on the surface of the Li anode. The fabricated SEI layer shows high ionic conductivity and lithium transference number, which is beneficial for inducing homogeneous Li deposition, effectively suppressing the nucleation and growth of dendrite. Moreover, the uniform and stable SEI layer with a well-designed network structure can availably protect the Li anode from directly contacting with the electrolyte, reducing the related side reactions and effectually limit the additional consumption of the active Li and electrolyte. The symmetric Li cells can cycle stably over 1200 h without short-circuit at the current/capacity densities of 1 (1 mAh/cm2) and 5 mA/cm2 (5 mAh/cm2). The assembled LiFePO4/LPEDV-Li cells exhibit high capacity retention up to 81.3% after 2400 cycles at the high rate of 8 C. Therefore, the designed artificial SEI layer with excellent properties presents a high application potential in stabilizing the Li anode.
研究领域:
材料科学
·
电化学
·
电池技术
·
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）