Sandwich-like Prussian blue/graphene oxide composite films as ion-sieves for fast and uniform Li ionic flux in highly stable Li metal batteries

Jiang, Guangyu; Li, Kaiyuan; Mao, Jiayi; Jiang, Nan; Luo, Jinpeng; Ding, Guoyu; Li, Yahui; Sun, Fugen; Dai, Bing; Li, Yongsheng

doi:10.1016/j.cej.2019.123398

Cited by 39 publications

(26 citation statements)

References 50 publications

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“…As is known, CE is a critical parameter to evaluate the reversibility of Li metal anodes in the cycle, which is defined as the ratio of the amount of Li plating and stripping. [ 43,44 ] The cell with the bare Cu electrode exhibits the lowest stability with CE dropping to 86.1% after 80 cycles at a current density of 1 mA cm −2 for 1 mAh cm −2 (Figure S8a, Supporting Information), which is probably due to the irreversible capacity loss caused by the side reactions between fresh Li and electrolyte. [ 45 ] On the contrary, a stable and high CE of 98.1% for over 200 cycles was achieved with stable voltage hysteresis for the Li|Cu@UCLN cell (Figure S8a,b, Supporting Information), which is higher than that for the Cu@ULN, demonstrating the superiority of the UCLN film in regulating homogeneous Li deposition and suppressing Li dendrite growth.…”

Section: Resultsmentioning

confidence: 99%

Robust Artificial Solid‐Electrolyte Interfaces with Biomimetic Ionic Channels for Dendrite‐Free Li Metal Anodes

Jiang

et al. 2020

Advanced Energy Materials

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A robust artificial solid electrolyte interphase (SEI) film with biomimetic ionic channels and high stability is rationally designed and fabricated by combining the ClO4−‐decorated metal‐organic framework (UiO‐66‐ClO4) and flexible lithiated Nafion binder (Li‐Nafion). The high electronegativity and lithiophilicity of ClO4− groups chemically anchored into the UiO‐66 channels endow the SEI film with an excellent single‐ion conducting pathway, high Li+ transference number, and outstanding ionic conductivity, which can effectively prohibit undesirable reactions of the Li metal with the electrolyte and regulate fast and uniform Li+ flux. With further assistance of the flexible Li‐Nafion binder, the resulting UiO‐66‐ClO4/Li‐Nafion (UCLN) composite film exhibits an excellent mechanical strength to suppress the growth of Li dendrites and maintain the integral stability of the Li metal anodes during cycling. Consequently, the UCLN coated Li metal anodes (Li@UCLN) deliver remarkable cycling stabilities even under a high current density of up to 20 mA cm−2 and large areal capacity of up to 30 mAh cm−2, as well as enhanced rate capacities and cycle lifespans in the full cells even under the harsh conditions for high‐energy density applications.

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Section: Resultsmentioning

confidence: 99%

Robust Artificial Solid‐Electrolyte Interfaces with Biomimetic Ionic Channels for Dendrite‐Free Li Metal Anodes

Jiang

et al. 2020

Advanced Energy Materials

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“…Meanwhile, molecular brushes and PB nanospheres acted as spacers to prevent GO nanosheets from stacking, leading to porous structures for fast Li‐ion transport. [ 99,100 ]…”

Section: Traditional Separators With High Thermal Stability and Mechanical Strengthmentioning

confidence: 99%

Safer Lithium‐Ion Batteries from the Separator Aspect: Development and Future Perspectives

Liu

Jiang

et al. 2020

Energy & Environ Materials

158

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With the rapid development of lithium‐ion batteries (LIBs), safety problems are the great obstacles that restrict large‐scale applications of LIBs, especially for the high‐energy‐density electric vehicle industry. Developing component materials (e.g., cathode, anode, electrolyte, and separator) with high thermal stability and intrinsic safety is the ultimate solution to improve the safety of LIBs. Separators are crucial components that do not directly participate in electrochemical reactions during charging/discharging processes, but play a vital role in determining the electrochemical performance and safety of LIBs. In this review, the recent advances on traditional separators modified with ceramic materials and multifunctional separators ranging from the prevention of the thermal runaway to the flame retardant are summarized. The component–structure–performance relationship of separators and their effect on the comprehensive performance of LIBs are discussed in detail. Furthermore, the research challenges and future directions toward the advancement in separators for high‐safety LIBs are also proposed.

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“…However, the electrolyte wettability of polyolefin separators is still not satisfactory because of the hydrophobic nature of polyolefin materials. 12 In order to enhance the compatibility between separator and electrolyte, many methods 2,13,14 have been proposed, such as the use of high-dielectric constant polymer materials as separators, [15][16][17][18] surface modification of polyolefin separators, [19][20][21][22][23][24][25] using polymer electrolytes, [26][27][28] and so on. Recently, ceramic NPs coating is widely used to enhance the electrolyte wettability as well as promote the thermal stability of separators.…”

Section: Introductionmentioning

confidence: 99%

Resin‐silica composite nanoparticle grafted polyethylene membranes for lithium ion batteries

Sun

2021

J of Applied Polymer Sci

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To avoid the peeling‐off of ceramic nanoparticles (NPs) from polyolefin membranes usually occurred in commercially available ceramic NPs coated polyolefin separators for lithium batteries, we propose a simple one‐pot in‐situ reaction method to modify commercial polyethylene (PE) separators by surface grafting 3‐Aminophenol/formaldehyde (AF)/silica (SiO2) composite NPs. The AF/SiO2 composite NPs form self‐supporting connected pores on the modified layer of the separator surface, which ensures the transportation of Li+. Moreover, the PE@AF/SiO2 separators has higher electrolyte wettability and compatibility than neat PE separators attributed to the plentiful polar functional groups in the AF/SiO2 layer and AF/SiO2 composite NPs, resulting in higher lithium ion transference number (tLi+= 0.62) and ionic conductivity (σ = 0.722 mS cm−1). More importantly, the discharge capacity, capacity retention rate and coulombic efficiency (136.2 mA h g−1, 87.9% and 99%, respectively) after 200 cycles of Li|NMC half batteries with PE@AF/SiO2 separators, are all more excellent than that with the pure PE separator (125 mA h g−1, 83.1% and 85%, respectively). Our results show that the PE@AF/SiO2 separators obtained by this modification method have higher electrochemical stability in the lithium battery system.

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Sandwich-like Prussian blue/graphene oxide composite films as ion-sieves for fast and uniform Li ionic flux in highly stable Li metal batteries

Cited by 39 publications

References 50 publications

Robust Artificial Solid‐Electrolyte Interfaces with Biomimetic Ionic Channels for Dendrite‐Free Li Metal Anodes

Robust Artificial Solid‐Electrolyte Interfaces with Biomimetic Ionic Channels for Dendrite‐Free Li Metal Anodes

Safer Lithium‐Ion Batteries from the Separator Aspect: Development and Future Perspectives

Resin‐silica composite nanoparticle grafted polyethylene membranes for lithium ion batteries

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