Constructing flame-retardant gel polymer electrolytes via multiscale free radical annihilating agents for Ni-rich lithium batteries

Zhu, Tao; Liu, Guoqing; Chen, Dongli; Chen, Jinxuan; Qi, Peng; Sun, Jun; Gu, Xiaoyu; Zhang, Sheng

doi:10.1016/j.ensm.2022.05.051

Cited by 59 publications

(31 citation statements)

References 58 publications

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“…In the FT-IR spectra (Figure b), the vibrational peaks at ∼1467, 1342, 1280, and 1243 cm –1 are attributed to CH 2 scissoring, CH 2 wagging, asymmetric stretching, and CH 2 symmetric twisting of the PEO matrix, respectively. The strong characteristic peak at 1075 cm –1 is assigned to the C–O–C symmetric/asymmetric stretching modes of PEO chains. , The LiClO 4 salt exhibits the FT-IR peaks of a free ClO 4 – anion (dissociated part) at ∼947 cm –1 , as well as the undissociated LiClO 4 at ∼1645 cm –1 . , Notably, the addition of the Co 3 O 4 @PDA filler results in a blue shift of the ClO 4 – peak to ∼949 cm –1 , implying the formation of Lewis acid–base pairs between the catechol of PDA and ClO 4 – . , The dissociation degree of Li salt can be speculated from the relative intensity of ClO 4 – with respect to LiClO 4 . It is clear that the Co 3 O 4 @PDA CPE displays the highest ClO 4 – intensity compared to the Co 3 O 4 CPE and PEO SPE, suggesting the enhanced dissociation degree of LiClO 4 salt after filling the Co 3 O 4 @PDA additive.…”

Section: Resultsmentioning

confidence: 99%

Interface Manipulation of Composite Solid Polymer Electrolyte with Polydopamine to Construct Durable and Fast Li⁺ Conduction Pathways

Chen

Niu

et al. 2023

ACS Appl. Energy Mater.

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Taking advantage of light weight, flexibility, and flame retardancy, solid polymer electrolytes (SPEs) provide a feasible solution to these safety concerns and to the enhancement of energy density for lithium-ion batteries (LIBs). However, the development of SPEs is still restricted by low ionic conductivity. Herein, we develop a type of SPE filler built by flower-like Co3O4 microspheres as a lithiophilic backbone and polydopamine (PDA) as a multifunctional coating for the engineering of the interphase properties of the polyether-based SPEs. The hierarchical structure of Co3O4 affords large interfacial contact area with SPEs and effectively suppresses the regular crystallinity of poly(ethylene oxide) (PEO) segments. Moreover, the PDA coating layers with diverse surface functionalities serve as a versatile mediator to finely tune ionic distribution and transport behavior via multiple Lewis acid–base interactions. We uncover the interphase characterizations and their synergistic effects to enhance Li+ conductivity and mechanical/electrochemical stability. This study provides intriguing alternatives for developing composite solid polymer electrolytes (CPEs), for which we further demonstrate the potential application of Co3O4@PDA-based CPEs in all-solid-state LIBs.

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Section: Resultsmentioning

confidence: 99%

Interface Manipulation of Composite Solid Polymer Electrolyte with Polydopamine to Construct Durable and Fast Li⁺ Conduction Pathways

Chen

Niu

et al. 2023

ACS Appl. Energy Mater.

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“…These long-cycle performances are comparable to some reported LMAs using other electrolytes (Table S1, Supporting Information). [46][47][48][49][50] Compared with the dark surface of bare Li with LE after 50 cycles at a current density of 1 mA cm −2 for 1 mAh cm −2 , the bright surface for Li with SZ-GPE indicates the excellent electrochemical reversibility and interface stability (Figure S21, Supporting Information). The surface and cross-sectional morphologies of bare Li reveal massive irregular Li dendrites and volume expansion after cycling (Figure 4c,d).…”

Section: Resultsmentioning

confidence: 99%

Multiscale Structural Gel Polymer Electrolytes with Fast Li⁺ Transport for Long‐Life Li Metal Batteries

Yang

Liu

Wang

et al. 2022

Adv Funct Materials

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Li metal batteries (LMBs) are considered as promising candidates for future rechargeable batteries with high energy density. However, Li metal anode (LMA) is extensively sensitive to general liquid electrolytes, leading to unstable interphase and dendrites growth. Herein, a novel gel polymer electrolyte consisting of a micro-nanostructured poly(vinylidene fluoride-cohexafluoropropylene) matrix and inorganic fillers of Zeolite Socony Mobil-5 (ZSM-5) and SiO 2 nanoparticles, is fabricated to expedite Li + ions transport and suppress Li dendrite growth. Due to the Lewis acid interaction, SiO 2 can absorb amounts of PF 6 − and promote the dissociation of LiPF 6 . The specific sub-nanometer pore structure of ZSM-5 greatly enhances the Li + ion transference number. These structures can restrain the decomposition of electrolytes and build stable interphase on LMA. Therefore, the Li||Ni 0.8 Co 0.1 Mn 0.1 O 2 full cell maintains 92% capacity retention after 300 cycles at 1 C (1 C ≈190 mAh g −1 ) in carbonate electrolyte. This multiscale design provides an effective strategy for electrolyte exploration in high-performance LMBs.

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“…Synthesis of H-CMP: H-CMP was synthesized by a facile precipitation polycondensation with slight modifications from the previous reports [37] . Typically, 20 × 10 −3 m HCCP (Macklin Cooperation, 98%) and 1.6 × 10 −3 m TA (Macklin Cooperation, 98%) were dissolved in acetonitrile.…”

Section: Methodsmentioning

confidence: 99%

A Facile Immobilization Strategy for Soluble Phosphazene to Actualize Stable and Safe Lithium–Sulfur Batteries

Zhu

Chen

Liu

et al. 2022

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Lithium–sulfur batteries (LSBs) have attracted extensive attention owing to their high energy density and abundant sulfur resources. However, LSBs are still restricted by the unsatisfactory electrochemical performance resulting from the shuttle effect of lithium polysulfide (LiPSs), and the potential fire hazard caused by inflammable ether electrolytes and polyolefin separators. Herein, a facile immobilization strategy for hexachlorocyclotriphosphazene (HCCP) is creatively applied to address the above issues simultaneously. Insoluble HCCP cross‐linked microspheres (H‐CMP) are firstly obtained at ambient temperature using tannic acid (TA) as a cross‐linking agent and then a multifunctional separator coating is constructed based on H‐CMP. The released phosphorus‐related radicals from H‐CMP in wide temperatures effectively prevent the combustion of electrolytes and separators, and hence improve the fire safety of the Li–S pouch cell. Furthermore, H‐CMP availably chemisorbs LiPSs to interdict the shuttle effect, thereby dramatically improving the electrochemical performance of LSBs. The effectiveness of this strategy is also verified in high sulfur loading (6.38 mg cm‐2), high temperature (50 °C), and Li–S pouch cells. More importantly, H‐CMP exhibits sufficient stability for Li metal and suppression of Li dendrites. This facile immobilization strategy for multifunctional phosphazenes provides a competitive option for the large‐scale fabrication of high‐safety and high‐performance LSBs.

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Constructing flame-retardant gel polymer electrolytes via multiscale free radical annihilating agents for Ni-rich lithium batteries

Cited by 59 publications

References 58 publications

Interface Manipulation of Composite Solid Polymer Electrolyte with Polydopamine to Construct Durable and Fast Li⁺ Conduction Pathways

Interface Manipulation of Composite Solid Polymer Electrolyte with Polydopamine to Construct Durable and Fast Li⁺ Conduction Pathways

Multiscale Structural Gel Polymer Electrolytes with Fast Li⁺ Transport for Long‐Life Li Metal Batteries

A Facile Immobilization Strategy for Soluble Phosphazene to Actualize Stable and Safe Lithium–Sulfur Batteries

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Constructing flame-retardant gel polymer electrolytes via multiscale free radical annihilating agents for Ni-rich lithium batteries

Cited by 59 publications

References 58 publications

Interface Manipulation of Composite Solid Polymer Electrolyte with Polydopamine to Construct Durable and Fast Li+ Conduction Pathways

Interface Manipulation of Composite Solid Polymer Electrolyte with Polydopamine to Construct Durable and Fast Li+ Conduction Pathways

Multiscale Structural Gel Polymer Electrolytes with Fast Li+ Transport for Long‐Life Li Metal Batteries

A Facile Immobilization Strategy for Soluble Phosphazene to Actualize Stable and Safe Lithium–Sulfur Batteries

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Interface Manipulation of Composite Solid Polymer Electrolyte with Polydopamine to Construct Durable and Fast Li⁺ Conduction Pathways

Interface Manipulation of Composite Solid Polymer Electrolyte with Polydopamine to Construct Durable and Fast Li⁺ Conduction Pathways

Multiscale Structural Gel Polymer Electrolytes with Fast Li⁺ Transport for Long‐Life Li Metal Batteries