Functional metal–organic framework boosting lithium metal anode performance via chemical interactions

Li, Wen; Mi, Yingying; Weng, Zhe; Zhong, Yiren; Wu, Ziqi; Wang, Hailiang

doi:10.1039/c7sc00668c

Cited by 171 publications

(101 citation statements)

References 63 publications

(38 reference statements)

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“…As shown in Figure S11 (Supporting Information), the polarization suddenly increased after cycling for about 450 h, and the cell became short‐circuited near 640 h, which demonstrated inferior performance to the SLE Li symmetric cell. The improvements on the interfacial stability and compatibility of Li‐IL@MOF SLE have some connections with the increased t Li+ of the electrolyte, as previously explained by Wang and co‐workers . EIS Nyquist plots of the Li|Li‐IL@MOF|Li cell before and after Li plating/stripping experiment were compared, as shown in Figure b.…”

Section: Methodsmentioning

confidence: 55%

“…The t Li+ of pristine Li‐IL was only 0.14 (Figure S10a, Supporting Information) because the majority of the ionic conductive species in Li‐IL are [EMIM] + and [TFSI] − rather than Li + . A significantly increased t Li+ (0.36) was observed for Li‐IL@MOF SLE as shown in Figure S10b (Supporting Information), which we speculate was caused by the confinement of the [EMIM] + and [TFSI] − ions by the MOF host . The pores of the MOF are uniform with an aperture of about 12 × 7 Å, which is comparable to the sizes of IL ions (7.9 and 7.6 Å, respectively).…”

Section: Methodsmentioning

confidence: 80%

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A Metal–Organic‐Framework‐Based Electrolyte with Nanowetted Interfaces for High‐Energy‐Density Solid‐State Lithium Battery

et al. 2017

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Solid-state batteries (SSBs) are promising for safer energy storage, but their active loading and energy density have been limited by large interfacial impedance caused by the poor Li transport kinetics between the solid-state electrolyte and the electrode materials. To address the interfacial issue and achieve higher energy density, herein, a novel solid-like electrolyte (SLE) based on ionic-liquid-impregnated metal-organic framework nanocrystals (Li-IL@MOF) is reported, which demonstrates excellent electrochemical properties, including a high room-temperature ionic conductivity of 3.0 × 10 S cm , an improved Li transference number of 0.36, and good compatibilities against both Li metal and active electrodes with low interfacial resistances. The Li-IL@MOF SLE is further integrated into a rechargeable Li|LiFePO SSB with an unprecedented active loading of 25 mg cm , and the battery exhibits remarkable performance over a wide temperature range from -20 up to 150 °C. Besides the intrinsically high ionic conductivity of Li-IL@MOF, the unique interfacial contact between the SLE and the active electrodes owing to an interfacial wettability effect of the nanoconfined Li-IL guests, which creates an effective 3D Li conductive network throughout the whole battery, is considered to be the key factor for the excellent performance of the SSB.

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Section: Methodsmentioning

confidence: 55%

Section: Methodsmentioning

confidence: 80%

A Metal–Organic‐Framework‐Based Electrolyte with Nanowetted Interfaces for High‐Energy‐Density Solid‐State Lithium Battery

et al. 2017

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“…MIL‐125‐Ti was synthesized following a modified solvothermal method adopted from the literature . Terephthalic acid (BDC, 1.494 g) and titanium(IV) butoxide (1.546 g) were dissolved in a 30 mL mixed solvent of DMF and methanol (volumetric ratio 9:1).…”

Section: Methodsmentioning

confidence: 99%

“…With a large degree of variability in their ordered porous structure and chemical composition, MOF materials offer a good platform for tuning Li ion transport properties and Li deposition/dissolution behavior. Our group reported the first application of MOFs to Li metal electrodes: modifying the separator with an amine‐functionalized Ti‐containing MOF (NH 2 ‐MIL‐125‐Ti) increased the transference number of Li ions and enhanced the cycling stability of the Li metal anode . In another study, a Cu‐containing MOF (HKUST‐1) with a desirable pore size for immobilizing electrolyte anions enabled dendrite‐free Li deposition and long‐term stability at a high current density .…”

Section: Introductionmentioning

confidence: 99%

Metal Organic Framework Derivative Improving Lithium Metal Anode Cycling

Zhong

Lin

Wang

et al. 2020

Adv Funct Materials

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This work demonstrates a new approach in using metal organic framework (MOF) materials to improve Li metal batteries, a burgeoning rechargeable battery technology. Instead of using the MIL‐125‐Ti MOF structure directly, the material is decomposed into intimately‐mixed amorphous titanium dioxide and crystalline terephthalic acid. The resulting composite material outperforms the oxide alone, the organic component alone, and the parent MOF in suppressing Li dendrite growth and extending cycle life of Li metal electrodes. Coated on a commercial polypropylene separator, this material induces the formation of a desirable solid electrolyte interphase layer comprising mechanically flexible organic species and ionically conductive lithium nitride species, which in turn leads to Li||Cu and Li||Li cells that can stably operate for hundreds of charging–discharging cycles. In addition, this material strongly adsorbs lithium polysulfides and can also benefit the cathode of lithium–sulfur batteries.

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“…Nevertheless, Li metal anode suffers from serious Li dendrite issues induced by the uneven Li nucleation/deposition and unstable solid electrolyte interphase (SEI) films due to the highly active nature of Li metal. This leads to serious safety concerns, poor cycling efficiency, and a short lifespan of LMBs …”

mentioning

confidence: 99%

Uniform Lithium Nucleation Guided by Atomically Dispersed Lithiophilic CoN_x Sites for Safe Lithium Metal Batteries

et al. 2018

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The mossy lithium dendrite growth during repeated lithium plating/stripping induces low Coulombic efficiency, poor lifespan, and safety concerns of working lithium metal batteries. Herein, atomically dispersed CoNx‐doped graphene is exploited as a host to accommodate dendrite‐free lithium deposits. The coordination between Co and N in the conductive matrix can effectively regulate the local electronic structure, and thereby enhance the adsorption of lithium ions and promote the following nucleation process. Meanwhile, the doped N facilitates high dispersion of Co atoms into graphene through the CoN coordination bond. The strong lithiophilicity provided by N coordinated with Co promises a uniform lithium nucleation behavior, further contributing to the smooth lithium deposition morphology. These characteristics afford a superhigh Coulombic efficiency of 99.2% at 2.0 mA cm−2 (≈400 cycles) and 5.0 mA cm−2 (350 cycles), and 98.2% at 10.0 mA cm−2 (200 cycles) with a capacity of 2.0 mAh cm−2. LiFePO4|CoNC–Li full cells deliver a long lifespan of 340 cycles at 1.0 C (240 cycles for routine cells). This offers fresh insights into effectively regulating the lithiophilic chemistry of lithium metal host toward uniform nucleation and growth of lithium deposits in working high‐energy‐density batteries.

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Functional metal–organic framework boosting lithium metal anode performance via chemical interactions

Abstract: Stable-cycling Li metal anode is realized with a MOF layer regulating Li-ion transport and Li deposition via chemical interactions.

Cited by 171 publications

References 63 publications

A Metal–Organic‐Framework‐Based Electrolyte with Nanowetted Interfaces for High‐Energy‐Density Solid‐State Lithium Battery

A Metal–Organic‐Framework‐Based Electrolyte with Nanowetted Interfaces for High‐Energy‐Density Solid‐State Lithium Battery

Metal Organic Framework Derivative Improving Lithium Metal Anode Cycling

Uniform Lithium Nucleation Guided by Atomically Dispersed Lithiophilic CoN_x Sites for Safe Lithium Metal Batteries

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Functional metal–organic framework boosting lithium metal anode performance via chemical interactions

Abstract: Stable-cycling Li metal anode is realized with a MOF layer regulating Li-ion transport and Li deposition via chemical interactions.

Cited by 171 publications

References 63 publications

A Metal–Organic‐Framework‐Based Electrolyte with Nanowetted Interfaces for High‐Energy‐Density Solid‐State Lithium Battery

A Metal–Organic‐Framework‐Based Electrolyte with Nanowetted Interfaces for High‐Energy‐Density Solid‐State Lithium Battery

Metal Organic Framework Derivative Improving Lithium Metal Anode Cycling

Uniform Lithium Nucleation Guided by Atomically Dispersed Lithiophilic CoNx Sites for Safe Lithium Metal Batteries

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Product

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Uniform Lithium Nucleation Guided by Atomically Dispersed Lithiophilic CoN_x Sites for Safe Lithium Metal Batteries