Dendrite‐Free, High‐Rate, Long‐Life Lithium Metal Batteries with a 3D Cross‐Linked Network Polymer Electrolyte

Lu, Qianli; He, Yan‐Bing; Yu, Qipeng; Li, Baohua; Kaneti, Yusuf Valentino; Yao, Youwei; Kang, Feiyu; Yang, Quan‐Hong

doi:10.1002/adma.201604460

Cited by 645 publications

(314 citation statements)

References 49 publications

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“…More details are discussed in Figure S5 in the Supporting Information. [20] To further confirm the crosslink, the solubility test was conducted in a DMF solvent and crosslinked SPEs were not dissolved. After crosslinking reaction between epoxy of DE-PEG and amine of DA-PPG, the epoxy stretching peak (near 900 cm −1 ) disappeared and the CN bonding peak (near 934 cm −1 ) appeared.…”

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confidence: 99%

High‐Performance Li–Se Battery Enabled via a One‐Piece Cathode Design

Kim

Cho

Lee

2019

Advanced Energy Materials

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conductivity, and high volumetric energy density. [8][9][10] Moreover, Se is a reasonably priced element, being around $ 32 per kg when purchased in industrial quantities. [4] Comparable to the S cathode, a Se cathode also has major concerns regarding volume expansion of Se (>97%) and shuttle effects by polyselenide intermediates. [11,12] To address these concerns, most studies have focused on the incorporation of functional materials such as porous carbons, conductive polymers, and metal oxides. [5][6][7] In general, the Se cathode is prepared by complicated multistep processes, which are consisted of encapsulating of Se into porous carbon (Se/C composite), slurry preparation using high energy ball-mixing of Se/C composites and other additives, deposition of the slurry on a current collector, and finally pressing the cathode. [11][12][13] In the Se cathode, there exist complex interfaces due to multicomponents system. Furthermore, all the additives do not contribute to electrochemical redox reaction lowering energy density and polymer binder even can increase interfacial resistance. Thus, it would be highly desirable to provide a simple fabrication process and stable cycling to Li-Se battery. [14][15][16] Herein, we introduced a new design of Se cathode, which was simply prepared by electrochemical deposition of Se on Nifoam and subsequent coating of a thin layer of solid polymer electrolyte (SPE). The electrodeposition of Se on Ni-foam is an easy process, and direct contacts of Se on current collector provide facile charge transport. The SPE was easily prepared via crosslinking reaction of poly(ethylene glycol) diglycidyl ether (DE-PEG) and diamino-poly(propylene oxide) (DA-PPG) with subsequent immersion in a LiPF 6 based carbonate electrolyte. The elastic SPE layer is able to protect the delamination problem of Se from the Ni-foam controlling the volume expansion of Se, to provide facile ionic pathway, and to suppress Li-dendrite growth. The designed "One-piece" Se cathode was produced by facile manufacturing process and exhibited an ultrastable cycling performance of 0.001% capacity degradation per cycle for 3000 cycles at 1 C rate.A schematic preparation of the one-piece Se cathode is shown in Figure 1. In the preparation of the one-piece Se cathode, Se was electrodeposited on the Ni-foam and a prepolymer solution of SPE was poured on the Se/Ni-foam to fill the pore. The prepolymer was thermally cross-linked and liquid electrolyte was impregnated. At the bottom of Ni-foam, a thin layer (≈20 µm) of SPE was formed which was directly contacted with Li metal foil. Moreover, the thickness of SPE in A high-performance Li-Se battery is demonstrated by adopting a novel Se cathode design. The Se cathode is a one-piece body combined with a Se deposited current collector and a solid polymer electrolyte (SPE). In the preparation of the Se cathode, Se is electrodeposited on Ni-foam, and the pores are filled with SPE layers. Through this electrodeposition, the cathode is easily fabricated, and charge transports are facile...

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confidence: 99%

High‐Performance Li–Se Battery Enabled via a One‐Piece Cathode Design

Kim

Cho

Lee

2019

Advanced Energy Materials

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“…[7][8][9] Furthermore, the flexibility and elasticity of GPEs are also prone to tolerate the volume change of electrode materials and the dendrites of lithium metal during charge and discharge processes. [10][11][12][13] As a consequence, GPEs have become one of the most desirable alternatives among various electrolytes for the electrochemical energy storage devices, and significant progress has been made in lithium-ion batteries (LIBs), supercapacitors (SCs), lithium-oxygen (Li-O 2 ) batteries as well as the other kinds of electrochemical energy storage devices, such as sodium-ion batteries, lithium-sulfur batteries, fuel cells, and zinc-air batteries. [14][15][16] In order to meet the requirements of wearable devices for flexibility and deformability, more special GPEs with tough, [17] stretchable, [18] and compressible [19] functionalities have been also developed.…”

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confidence: 99%

Gel Polymer Electrolytes for Electrochemical Energy Storage

Cheng

Pan

Zhao

et al. 2017

Advanced Energy Materials

783

562

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storage devices with adjustable shapes and high flexibility, which is promising for the burgeoning portable and wearable electronics. [7][8][9] Furthermore, the flexibility and elasticity of GPEs are also prone to tolerate the volume change of electrode materials and the dendrites of lithium metal during charge and discharge processes. [10][11][12][13] As a consequence, GPEs have become one of the most desirable alternatives among various electrolytes for the electrochemical energy storage devices, and significant progress has been made in lithium-ion batteries (LIBs), supercapacitors (SCs), lithium-oxygen (Li-O 2 ) batteries as well as the other kinds of electrochemical energy storage devices, such as sodium-ion batteries, lithium-sulfur batteries, fuel cells, and zinc-air batteries. [14][15][16] In order to meet the requirements of wearable devices for flexibility and deformability, more special GPEs with tough, [17] stretchable, [18] and compressible [19] functionalities have been also developed.Typically, a polymeric framework is adopted in GPEs as host material, providing high mechanical integrity. Several criteria for a good polymer host lie in: [20][21][22] (i) fast segmental motion of polymer chain; (ii) special groups promoting the dissolution of salts; (iii) low glass transition temperature (T g ); (iv) high molecular weight; (v) wide electrochemical window; (vi) high degradation temperature. Within the framework, the salts in the GPEs serve as the sources of the charge carriers, which are generally required to have large anions and low dissociation energy for easier dissociating-induced free/mobile ions. According to the types of electrolytes, there are four categories of GPEs based on proton, [23] alkaline, [24] conducting salts, and ionic liquids (ILs). [25] The criteria for an appropriate electrolyte include: [26][27][28] (i) good dissociation without forming ion pairs or ion aggregation; (ii) high thermal, chemical, and electrochemical stability; (iii) high ionic conductivity. In order to dissolve both the polymer hosts and electrolytic salts, the organic/ aqueous solvents are introduced to provide the medium for ionic conduction. A good solvent should simultaneously have high dielectric constant (ɛ > 15), donor number for more dissociation of ion and chemical and electrochemical stability. Organic solvents normally include ethylene carbonate (EC), propylene carbonate (PC), diethyl carbonate (DEC), dimethyl carbonate (DMC), dimethyl formamide (DMF), dimethyl sulphoxide, ethyl methyl carbonate, and tetrahydrofuran.To prepare a high-performance GPE, it is essential to select the species of host polymer, solvent, and electrolytic salt, and then blend them by solution or melt processes, such as casting With the booming development of flexible and wearable electronics, their safety issues and operation stabilities have attracted worldwide attentions. Compared with traditional liquid electrolytes, gel polymer electrolytes (GPEs) are preferred due to their higher safety and adaptability to the design of ...

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“…An initiator-free one-pot synthesis strategy based on a ring-opening polymerization reaction to prepare a tough and compact 3D network gel polymer electrolyte ( Fig. 3c) was proposed by Lu et al [73]. The researchers proposed this synthesis method based on the fact that radical initiation processes have inherent disadvantages in which by-products such as free radicals and residual monomers are highly reactive with Li metal, increasing electrode resistances and severely degrading battery performances [111].…”

Section: Crosslinkingmentioning

confidence: 99%

“…Up until now, numerous polymer/ liquid hybrid electrolytes along with the individual components have been studied and reported with equal intensity. These include polymer matrixes such as polyethylene oxide (PEO) and its derivate [73], poly(vinylidene fluoride) (PVDF) [74], poly(ethylene glycol) diacrylate (PEGDMA) [75], polymeric ionic liquid (PIL) and so on [76], as well as conventional liquid electrolytes and ionic liquids [77][78][79]. Here, the study of the liquid ingredients in polymer matrixes has been mainly devoted to the resolution of the diffusion issue as well as the realization of better interfacial adhesion between the two electrodes.…”

Section: Polymer/liquid Hybrid Electrolytesmentioning

confidence: 99%

Recent Advancements in Polymer-Based Composite Electrolytes for Rechargeable Lithium Batteries

Tan

Zeng

et al. 2018

Electrochem. Energ. Rev.

334

170

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In recent years, lithium batteries using conventional organic liquid electrolytes have been found to possess a series of safety concerns. Because of this, solid polymer electrolytes, benefiting from shape versatility, flexibility, low-weight and low processing costs, are being investigated as promising candidates to replace currently available organic liquid electrolytes in lithium batteries. However, the inferior ion diffusion and poor mechanical performance of these promising solid polymer electrolytes remain a challenge. To resolve these challenges and improve overall comprehensive performance, polymers are being coordinated with other components, including liquid electrolytes, polymers and inorganic fillers, to form polymer-based composite electrolytes. In this review, recent advancements in polymer-based composite electrolytes including polymer/ liquid hybrid electrolytes, polymer/polymer coordinating electrolytes and polymer/inorganic composite electrolytes are reviewed; exploring the benefits, synergistic mechanisms, design methods, and developments and outlooks for each individual composite strategy. This review will also provide discussions aimed toward presenting perspectives for the strategic design of polymer-based composite electrolytes as well as building a foundation for the future research and development of high-performance solid polymer electrolytes.

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Dendrite‐Free, High‐Rate, Long‐Life Lithium Metal Batteries with a 3D Cross‐Linked Network Polymer Electrolyte

Cited by 645 publications

References 49 publications

High‐Performance Li–Se Battery Enabled via a One‐Piece Cathode Design

High‐Performance Li–Se Battery Enabled via a One‐Piece Cathode Design

Gel Polymer Electrolytes for Electrochemical Energy Storage

Recent Advancements in Polymer-Based Composite Electrolytes for Rechargeable Lithium Batteries

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