A sandwich-type composite polymer electrolyte for all-solid-state lithium metal batteries with high areal capacity and cycling stability

Xie, Zhengkun; Wu, Zhijun; An, Xiaowei; Yue, Xiyan; Xiaokaiti, Pairuzha; Yoshida, Akihiro; Abudula, Abuliti; Guan, Guoqing

doi:10.1016/j.memsci.2019.117739

Cited by 83 publications

(54 citation statements)

References 55 publications

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“…Compared to the above‐discussed strategies for liquid electrolyte systems, the construction of SSEs is more promising since theoretically SSEs can not only suppress Li dendrite growth but solve the safety concerns caused by organic solvents in liquid electrolytes. [ 49–51 ] Besides, according to computational and experimental studies, SSEs with high t Li + s would benefit LMBs, help stabilize the electrodeposition process, and reduce concentration gradients. [ 52,53 ] Therefore, with cationic transference numbers close to unity combined with their intrinsic flexibility and processability, SICPEs may be an ideal SSE candidate for LMBs, achieving next‐generation energy storage devices with high‐energy density, improved safety, and prolonged lifetime.…”

Section: Introductionmentioning

confidence: 99%

Single‐Ion Conducting Polymer Electrolytes for Solid‐State Lithium–Metal Batteries: Design, Performance, and Challenges

Zhu

Zhang

Zhao

et al. 2021

Advanced Energy Materials

254

230

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Realizing solid‐state lithium batteries with higher energy density and enhanced safety compared to the conventional liquid lithium‐ion batteries is one of the primary research and development goals set for next‐generation batteries in this decade. In this regard, polymer electrolytes have been widely researched as solid electrolytes due to their excellent processability, flexibility, and low weight. With high cationic transference numbers (tLi+ close to 1), single‐ion conducting polymer electrolytes (SICPEs) have tremendous advantages compared to polymer electrolyte systems (tLi+ < 0.4) because of their potential to reduce the buildup of ion concentration gradients and suppress growth of lithium dendrites. The current review covers the fundamentals of SICPEs, including anionic unit synthesis, polymer structure design, and film fabrication, along with simulation and experimental results in solid‐state lithium–metal battery applications. A perspective on current challenges, possible solutions, and potential research directions of SICPEs is also discussed to provide the research community with the critical technical aspects that may advance SICPEs as solid electrolytes in next‐generation energy storage systems.

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Section: Introductionmentioning

confidence: 99%

Single‐Ion Conducting Polymer Electrolytes for Solid‐State Lithium–Metal Batteries: Design, Performance, and Challenges

Zhu

Zhang

Zhao

et al. 2021

Advanced Energy Materials

254

230

View full text Add to dashboard Cite

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“…Notably, the inorganic fillers loading in our work is extremely low (≈1 wt%), much lower than the most recently reported CPEs. [ 24,25,30,49 ] Our work provides a novel strategy toward cost‐effective and scalable solid polymer electrolytes for ASSLMBs operated at RT.…”

Section: Resultsmentioning

confidence: 99%

Ultrathin Layered Double Hydroxide Nanosheets Enabling Composite Polymer Electrolyte for All‐Solid‐State Lithium Batteries at Room Temperature

Xia

Yang

Zhang

et al. 2021

Adv Funct Materials

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Solid electrolytes are the most promising substitutes for liquid electrolytes to construct high‐safety and high‐energy‐density energy storage devices. Nevertheless, the poor lithium ion mobility and ionic conductivity at room temperature (RT) have seriously hindered their practical usage. Herein, single‐layer layered‐double‐hydroxide nanosheets (SLN) reinforced poly(vinylidene fluoride‐co‐hexafluoropropylene) (PVDF‐HFP) composite polymer electrolyte is designed, which delivers an exceptionally high ionic conductivity of 2.2 × 10−4 S cm−1 (25 °C), superior Li+ transfer number (≈0.78) and wide electrochemical window (≈4.9 V) with a low SLN loading (≈1 wt%). The Li symmetric cells demonstrate ultra‐long lifespan stable cycling over ≈900 h at 0.1 mA cm−2, RT. Moreover, the all‐solid‐state Li|LiFePO4 cells can run stably with a high capacity retention of 98.6% over 190 cycles at 0.1 C, RT. Moreover, using LiCoO2/LiNi0.8Co0.1Mn0.1O2, the all‐solid‐state lithium metal batteries also demonstrate excellent cycling at RT. Density functional theory calculations are performed to elucidate the working mechanism of SLN in the polymer matrix. This is the first report of all‐solid‐state lithium batteries working at RT with PVDF‐HFP based solid electrolyte, providing a novel strategy and significant step toward cost‐effective and scalable solid electrolytes for practical usage at RT.

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“…Herein, we developed a multispectral characterization strategy combined with first‐principles calculations to explore aforesaid mysteries through analyzing a polyvinylidene fluoride‐hexafluoropropylene (PVDF‐HFP) based model system with excellent electrochemical stability [21–25] . This system consisted of PVDF‐HFP, lithium bisfluoromethane sulfimide (LiTFSI) and tetraglyme (G4).…”

Section: Figurementioning

confidence: 99%

Insights into the Ionic Conduction Mechanism of Quasi‐Solid Polymer Electrolytes through Multispectral Characterization

Hou

et al. 2021

Angewandte Chemie

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Quasi‐solid polymer electrolytes (QPE) composed of Li salts, polymer matrix, and solvent, are beneficial for improving the security and energy density of batteries. However, the ionic conduction mechanism, existential form of solvent molecules, and interactions between different components of QPE remain unclear. Here we develop a multispectral characterization strategy combined with first‐principles calculations to unravel aforesaid mysteries. The results indicate that the existential state of solvent in QPE is quite different from that in liquid electrolyte. The Li cations in gel polymer electrolyte are fully solvated by partial solvent molecules to form a local high concentration of Li+, while the other solvent molecules are fastened by polymer matrix in QPE. As a result, the solvation structure and conduction mechanism of Li+ are similar to those in high‐concentrated liquid electrolyte. This work provides a new insight into the ionic conduction mechanism of QPE and will promote its application for safe and high‐energy batteries.

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A sandwich-type composite polymer electrolyte for all-solid-state lithium metal batteries with high areal capacity and cycling stability

Cited by 83 publications

References 55 publications

Single‐Ion Conducting Polymer Electrolytes for Solid‐State Lithium–Metal Batteries: Design, Performance, and Challenges

Single‐Ion Conducting Polymer Electrolytes for Solid‐State Lithium–Metal Batteries: Design, Performance, and Challenges

Ultrathin Layered Double Hydroxide Nanosheets Enabling Composite Polymer Electrolyte for All‐Solid‐State Lithium Batteries at Room Temperature

Insights into the Ionic Conduction Mechanism of Quasi‐Solid Polymer Electrolytes through Multispectral Characterization

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