Oxygen- and dendrite-resistant ultra-dry polymer electrolytes for solid-state Li–O2 batteries

Yu, Wei; Xue, Chuanjiao; Hu, Bing; Xu, Bingqing; Li, L.; Nan, Ce Wen

doi:10.1016/j.ensm.2020.02.001

Cited by 50 publications

(48 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This improvement can be attributed to the stabilization of the electrolyte-electrode interface [ 11 ]. In contrast, the interfacial resistance of the liquid electrolyte-based cell kept increasing from the first cycles on, which indicates both the decomposition of liquid electrolyte and the constant formation of a SEI layer, and the accumulation of dead Li, up to the 14th cycle where the cell was failing [ 4 , 8 ]. The reason for the lower polarization of the cell containing the 5 wt% NS-based CGPE after 35 cycles compared to the one of the LE cell at the 14th cycle can be attributed to the improved t Li+ (see Figure 4 c,d), contributing to a lowered concentration polarization in the 5 wt% NS-based CGPE [ 28 ].…”

Section: Resultsmentioning

confidence: 99%

“…The replacement of liquid electrolytes with solid ones does not change the fundamental reaction of the Li-O 2 batteries, which is still the well-known formation and decomposition of Li 2 O 2 . However, only a few works about ceramic-based Li-O 2 batteries have been reported because of the difficulty in establishing a tri-phase (O 2 /e − /Li + ) reaction between the cathode and a ceramic-based electrolyte [ 8 , 9 , 10 ]. Moreover, solid state electrolytes with low conductivity at room temperature require an elevated operating temperature of the cells, which aggravates the side-reactions and the safety hazards [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, solid state electrolytes with low conductivity at room temperature require an elevated operating temperature of the cells, which aggravates the side-reactions and the safety hazards [ 4 ]. Therefore, in the last few years, multifunctional polymer-based electrolytes for quasi-solid-state Li-O 2 batteries have been thoroughly studied [ 8 ]. However, polymer electrolytes share a common issue with ceramic electrolytes, which is their high interfacial resistance and low ionic conductivity, both limiting their practical applications at ambient temperature [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nanosponge-Based Composite Gel Polymer Electrolyte for Safer Li-O2 Batteries

et al. 2021

View full text Add to dashboard Cite

Li-O2 batteries represent a promising rechargeable battery candidate to answer the energy challenges our world is facing, thanks to their ultrahigh theoretical energy density. However, the poor cycling stability of the Li-O2 system and, overall, important safety issues due to the formation of Li dendrites, combined with the use of organic liquid electrolytes and O2 cross-over, inhibit their practical applications. As a solution to these various issues, we propose a composite gel polymer electrolyte consisting of a highly cross-linked polymer matrix, containing a dextrin-based nanosponge and activated with a liquid electrolyte. The polymer matrix, easily obtained by thermally activated one pot free radical polymerization in bulk, allows to limit dendrite nucleation and growth thanks to its cross-linked structure. At the same time, the nanosponge limits the O2 cross-over and avoids the formation of crystalline domains in the polymer matrix, which, combined with the liquid electrolyte, allows a good ionic conductivity at room temperature. Such a composite gel polymer electrolyte, tested in a cell containing Li metal as anode and a simple commercial gas diffusion layer, without any catalyst, as cathode demonstrates a full capacity of 5.05 mAh cm−2 as well as improved reversibility upon cycling, compared to a cell containing liquid electrolyte.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nanosponge-Based Composite Gel Polymer Electrolyte for Safer Li-O2 Batteries

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Lithium metal is widely considered as an ideal anode due to its lightweight (0.53 g cm −3 ), high theoretical specific capacity (3860 mAh g −1 ), and low electrochemical potential (−3.04 V vs. standard hydrogen electrode), showing the exceedingly promising application in lithium metal batteries (LMBs), such as Li‐S, [ 2 ] Li‐Se, [ 3 ] and Li‐O 2 batteries. [ 2c,d,4 ] However, the practical applications of LMBs are still significantly hindered due to a series of challenges. First, the uncontrollable dendritic Li growth can penetrate through the separator, resulting in the internal short circuit.…”

Section: Introductionmentioning

confidence: 99%

Bifunctional 3D Hierarchical Hairy Foam toward Ultrastable Lithium/Sulfur Electrochemistry

Zeng

Chen

et al. 2020

Adv Funct Materials

View full text Add to dashboard Cite

The dendrite formation resulting from the irregular lithium deposition and the infinite volume expansion in lithium anodes significantly impede their commercialization for high energy applications. Herein, it is demonstrated that carbon nanofibers (CNFs) grown in situ on a nickel foam (CNF@Ni) can locally change the Li stripping/plating behavior by reducing the nucleation overpotential and regulating the electric field distribution. The 3D conductive hairy foam with a hierarchical structure can provide sufficient active sites for lithium nucleation. In addition, the numerous CNFs with protuberant tips can act as the charge centers and significantly increase the electrochemically active surface area, resulting in the locally reduced and uniformly distributed current density. The symmetric cells using CNF@Ni-Li electrodes can achieve ultralong lifespan with low voltage hysteresis up to 1000 h. More remarkably, the CNF@Ni hairy foam can simultaneously enable reliable sulfur electrochemistry. The corresponding Li-S full cell shows excellent cycle stability with a high capacity of ≈400 mAh g −1 at 5 C after 800 cycles. This work provides an exemplary way to concurrently address the challenges in lithium and sulfur electrodes toward the development of high-performance Li-S batteries.

show abstract

“…standard hydrogen electrode) [1][2][3]. Li metal anode-based batteries, such as Li-S and Li-O 2 /CO 2 batteries, can be used as high-energy-density battery systems to meet the requirements of electric vehicles [4][5][6][7][8]. However, volume change during Li plating/stripping processes and the existence of Li dendrites in Li metal anodes impede their applications [9,10].…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional lithiophilic Cu@Sn nanocones for dendrite-free lithium metal anodes

Wang

Shi

et al. 2020

Sci. China Mater.

View full text Add to dashboard Cite

The uneven deposition of lithium (Li) on current collectors causes serious dendrite growth and volume expansion. Commercial foamed copper (Cu) current collectors are unsuitable for Li anodes because of their large volume and mass and lithiophobic nature. Herein, a three-dimensional (3D) copper@tin (Cu@Sn) nanocone current collector with small volume, light weight, and lithiophilic nature was prepared by a simple electrodeposition method. The synergy of the nanoconical structure and lithiophilic Sn promotes the even deposition of Li and effectively inhibits the formation of Li dendrites. The resultant half batteries exhibit high Coulombic efficiency of 97.6% after 100 cycles at 1 mA cm −2 , and the symmetrical Li battery demonstrates a prolonged lifespan of over 600 h at 1 mA cm −2 . The full battery based on organic liquid electrolyte with LiFePO 4 also exhibits a long lifespan of 550 cycles with high capacity retention of 95.1% at 1 C. Moreover, 3D Cu@Sn nanocone-based solid-state batteries exhibit excellent electrochemical performance and show no decay after 500 cycles at 1 C. Our work provides a strategy for fabricating 3D current collectors for high-energy-density Li metal batteries.

show abstract

Oxygen- and dendrite-resistant ultra-dry polymer electrolytes for solid-state Li–O2 batteries

Cited by 50 publications

References 60 publications

Nanosponge-Based Composite Gel Polymer Electrolyte for Safer Li-O2 Batteries

Nanosponge-Based Composite Gel Polymer Electrolyte for Safer Li-O2 Batteries

Bifunctional 3D Hierarchical Hairy Foam toward Ultrastable Lithium/Sulfur Electrochemistry

Three-dimensional lithiophilic Cu@Sn nanocones for dendrite-free lithium metal anodes

Contact Info

Product

Resources

About