A composite solid polymer electrolyte incorporating MnO<sub>2</sub> nanosheets with reinforced mechanical properties and electrochemical stability for lithium metal batteries

Li, Yuhan; Sun, Zhanbo; Liu, Dongyu; Gao, Yiyang; Wang, Yuankun; Bu, Huaitian; Li, Mingtao; Zhang, Yanfeng; Gao, Guoxin

doi:10.1039/c9ta11542k

Cited by 138 publications

(81 citation statements)

References 58 publications

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“…Theo ligomers also serve as disrupting agent for PEO chains,leading to the generation of amorphous region for Li ion immigration. As ac onsequence,the assembled cells utilizing the optimized composite [46][47][48][49][53][54][55][56][57][58][59][60][61][62][63] e) Safety test for the asobtained solid electrolyte under cutting and burning conditions.…”

Section: Discussionmentioning

confidence: 99%

In‐Situ Intermolecular Interaction in Composite Polymer Electrolyte for Ultralong Life Quasi‐Solid‐State Lithium Metal Batteries

Cheng

et al. 2021

Angew Chem Int Ed

121

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Solid‐state lithium metal batteries built with composite polymer electrolytes using cubic garnets as active fillers are particularly attractive owing to their high energy density, easy manufacturing and inherent safety. However, the uncontrollable formation of intractable contaminant on garnet surface usually aggravates poor interfacial contact with polymer matrix and deteriorates Li+ pathways. Here we report a rational designed intermolecular interaction in composite electrolytes that utilizing contaminants as reaction initiator to generate Li+ conducting ether oligomers, which further emerge as molecular cross‐linkers between inorganic fillers and polymer matrix, creating dense and homogeneous interfacial Li+ immigration channels in the composite electrolytes. The delicate design results in a remarkable ionic conductivity of 1.43×10−3 S cm−1 and an unprecedented 1000 cycles with 90 % capacity retention at room temperature is achieved for the assembled solid‐state batteries.

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Section: Discussionmentioning

confidence: 99%

In‐Situ Intermolecular Interaction in Composite Polymer Electrolyte for Ultralong Life Quasi‐Solid‐State Lithium Metal Batteries

Cheng

et al. 2021

Angew Chem Int Ed

121

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“…Considering thoroughly the SEI factor of mechanical strength, Li diffusion rate, and structural uniformity, Li et al. [ 114 ] designed an artificial composite SEI incorporating MnO 2 nanosheets with mechanical strength and high diffusion rate uniformly distributed in PEO (Figure 17c). Xu et al.…”

Section: Dendrite Inhibition Strategiesmentioning

confidence: 99%

“…Reproduced with permission. [ 114 ] Copyright 2020, Royal Society of Chemistry. d) Schematic diagram of Li deposition behavior with APL which is conformal and mechanically strong to prevent Li dendrite growth.…”

Section: Dendrite Inhibition Strategiesmentioning

confidence: 99%

Review on Li Deposition in Working Batteries: From Nucleation to Early Growth

et al. 2021

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remarkable evolutions with continuous performance improvements, [4] after three decades of continuous research and development, the typical LIBs employ graphite (theoretical capacity of 372 mAh g −1) as the anode. [5] The energy density of LIB progressively approaches its theoretical limit. Therefore, exploring the next generation anode materials, which can break the ceiling of theoretical capacity of LIBs, is essential for the emerging applications to achieve wireless and green world. [6] Li metal is highly recognized as the very promising alternative anode material due to its low electrochemical potential of −3.04 V versus the standard hydrogen electrode and ultrahigh theoretical capacity of 3860 mAh g −1 , [7] which is almost 10 times of commercial graphite anode. Nevertheless, the disordered Li dendrite deposition during charge/discharge process motivates the dramatical fluctuation of the surface of Li anode, thus resulting in the break/ repair of the solid-electrolyte interphase (SEI) with severe phase migrations, electrolyte consumptions and thermal accumulations. [8] The unexpected microstructural Li dendrite can easily loss the electric connection with the bulk Li or current collector and subsequently form "dead Li," causing severe capacity loss. [9] Moreover, Li dendrite deposition not only aggravates battery performance with low Coulombic efficiency (CE) and rapid capacity decay, [10] but also engenders thermal runaway and even serious safety hazards caused by the internal shorting. [11] Therefore, preventing the lithium dendrite growth plays the key role to accomplish the next-generation highenergy-density and safe Li metal batteries (LMBs). [12] How to suppress the Li dendrite growth raises an inescapable question: why Li tends to deposit dendritic morphology? The formation of Li dendrite undergoes two process including Li nucleation and Li growth. [13] The growth process immediately follows nucleation and develops on the surface of nuclei with their incorporation into the structure of the Li metal lattice. Herein the final deposition morphology tightly relies on the Li nucleation and early growth. [14] Figuring out the Li nucleation and early growth is critical to further explore the dendrite inhibition strategies for safe and long-lifespan LMBs. Recently, many insightful and influential models have been proposed to understand the process of Li deposition from nucleation to early growth. [15] Specifically, 1) heterogeneous model describes the heterogeneous nucleation and early growth behavior; 2) surface diffusion model demonstrates Lithium (Li) metal is one of the most promising alternative anode materials of next-generation high-energy-density batteries demanded for advanced energy storage in the coming fourth industrial revolution. Nevertheless, disordered Li deposition easily causes short lifespan and safety concerns and thus severely hinders the practical applications of Li metal batteries. Tremendous efforts are devoted to understanding the mechanism for Li deposition, while the final depositio...

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“…[6][7][8][9] Fortunately, the rapid development of lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) has mitigated some concerns. [10,11] However, the commercial graphite anode material exhibits a low specific capacity (only 372 mAh g À1 ) in LIBs and inferior sodium-storage activity for SIBs, which seriously hinders the development of secondary rechargeable batteries. [12][13][14][15] Therefore, finding a suitable anode material is the main work at present.…”

Section: Introductionmentioning

confidence: 99%

Boosting Transport Kinetics of Cobalt Sulfides Yolk–Shell Spheres by Anion Doping for Advanced Lithium and Sodium Storage

et al. 2020

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Cobalt sulfides have been popularly used in energy storage because of their high theoretical capacity and abundant redox reactions. However, poor reaction kinetics, rapid capacity decay, and severe polarization owing to volume changes during electrochemical reaction are still huge challenges for cobalt sulfides in practical applications. Herein, cobalt sulfide yolk–shell spheres were synthesized by phosphorus doping (P‐CoS) to stabilize the structure of cobalt sulfides and improve their electronic/ion conductivity. Kinetic tests and density functional theory calculations confirm that the introduction of phosphorus into cobalt sulfides greatly reduces the diffusion barrier of Li+ in the intrinsic structure, thereby improving the reaction kinetics of electrode materials during the Li+ insertion/extraction process. In consequence, the P‐CoS electrode delivers a high lithium storage capacity (781 mAh g−1 after 100 cycles at 0.2 A g−1), excellent rate capability (489 mAh g−1 at 10 A g−1), and outstanding cycling stability (no significant capacity decay over 4000 cycles at 5 A g−1). Especially for sodium‐ion battery application, the P‐CoS electrode expresses a striking capacity of approximately 260 mAh g−1 at 2 A g−1 after 900 cycles.

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A composite solid polymer electrolyte incorporating MnO₂ nanosheets with reinforced mechanical properties and electrochemical stability for lithium metal batteries

Abstract: The mechanical properties and electrochemical stability of a PEO based composite solid polymer electrolyte are enhanced by adding MnO2 nanosheets.

Cited by 138 publications

References 58 publications

In‐Situ Intermolecular Interaction in Composite Polymer Electrolyte for Ultralong Life Quasi‐Solid‐State Lithium Metal Batteries

In‐Situ Intermolecular Interaction in Composite Polymer Electrolyte for Ultralong Life Quasi‐Solid‐State Lithium Metal Batteries

Review on Li Deposition in Working Batteries: From Nucleation to Early Growth

Boosting Transport Kinetics of Cobalt Sulfides Yolk–Shell Spheres by Anion Doping for Advanced Lithium and Sodium Storage

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A composite solid polymer electrolyte incorporating MnO2 nanosheets with reinforced mechanical properties and electrochemical stability for lithium metal batteries

Abstract: The mechanical properties and electrochemical stability of a PEO based composite solid polymer electrolyte are enhanced by adding MnO2 nanosheets.

Cited by 138 publications

References 58 publications

In‐Situ Intermolecular Interaction in Composite Polymer Electrolyte for Ultralong Life Quasi‐Solid‐State Lithium Metal Batteries

In‐Situ Intermolecular Interaction in Composite Polymer Electrolyte for Ultralong Life Quasi‐Solid‐State Lithium Metal Batteries

Review on Li Deposition in Working Batteries: From Nucleation to Early Growth

Boosting Transport Kinetics of Cobalt Sulfides Yolk–Shell Spheres by Anion Doping for Advanced Lithium and Sodium Storage

Contact Info

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A composite solid polymer electrolyte incorporating MnO₂ nanosheets with reinforced mechanical properties and electrochemical stability for lithium metal batteries