Toward Practical Solid‐State Polymer Lithium Batteries by In Situ Polymerization Process: A Review

Advanced Energy Materials, Год журнала: 2023, Номер 13(30)

Опубликована: Июнь 25, 2023

Abstract Although there are various strategies for solid‐state polymer lithium batteries (SSPLBs) manufacturing, the most promising is in situ polymerization process. The process inherits good liquid electrolyte/electrode interfacial contact and compatible with existing lithium‐ion manufacturing processes, making it easy to achieve scale‐up production. However, of current studies on based lab‐level coin cells, while practical pouch cells much less studied. There a huge difference between SSPLBs SSPLBs. Here, as complement reports reviews, systematic review challenges design principles fabricating provided enable comprehensive understanding strategic guidance applications. This thoroughly discusses recent advances regarding fabrication using presents future outlook by processes. Furthermore, critical issues electrode materials highlighted during process, an attempt made call more attention performance

Язык: Английский

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Molecular anchoring of free solvents for high-voltage and high-safety lithium metal batteries

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Март 6, 2024

Abstract Constraining the electrochemical reactivity of free solvent molecules is pivotal for developing high-voltage lithium metal batteries, especially ether solvents with high Li compatibility but low oxidation stability ( <4.0 V vs + /Li). The typical concentration electrolyte approach relies on nearly saturated coordination to molecules, which confronted severe side reactions under voltages >4.4 V) and extensive exothermic between reactive anions. Herein, we propose a molecular anchoring restrict interfacial in diluted electrolytes. hydrogen-bonding interactions from effectively suppress excessive enhances nickel rich cathodes at 4.7 V, despite extremely /ether molar ratio (1:9) absence anion-derived interphase. Furthermore, processes thermal abuse conditions are mitigated due reduced anions, postpones battery runaway.

Язык: Английский

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Stable Non‐flammable Phosphate Electrolyte for Lithium Metal Batteries via Solvation Regulation by the Additive

Advanced Functional Materials, Год журнала: 2023, Номер 33(30)

Опубликована: Апрель 26, 2023

Abstract The application of lithium metal batteries (LMBs) is impeded by safety concerns. Employing non‐flammable electrolytes can improve battery reliability while the cost and performance deterioration limit their popularization. Herein, a high‐performance electrolyte designed, 1.5 m LiTFSI in propylene carbonate (PC)/triethyl phosphate (TEP) (4:1 vol.) with 4‐nitrophenyl trifluoroacetate (TFANP) as additive, which facilitate construction LiF‐rich solid interphase (SEI) on Li anode surface cathode (CEI) through its prioritized decomposition. In TFANP‐containing electrolyte, decreased TEP coordination number solvation sheath relieves adverse effect active both SEI CEI for suppressing growth dendrites reducing continuous consumption. Thus, Li||LiNi 0.6 Co 0.2 Mn O 2 such an deliver 132 mAh g −1 after 150 cycles high coulombic efficiency (99.5%) superior rate (110 at 5 C, 1 C = 200 mA ). This work provides new additive insight reliable LMBs.

Язык: Английский

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Long‐cycling and High‐voltage Solid State Lithium Metal Batteries Enabled by Fluorinated and Crosslinked Polyether Electrolytes

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(17)

Опубликована: Март 6, 2024

Abstract Solid‐state lithium metal batteries (LMBs), constructed through the in situ fabrication of polymer electrolytes, are considered a critical strategy for next‐generation battery systems with high energy density and enhanced safety. However, constrained oxidation stability polymers, such as extensively utilized polyethers, limits their applications high‐voltage further improvements. Herein, an fabricated fluorinated crosslinked polyether‐based gel electrolyte, FGPE, is presented, exhibiting potential (5.1 V). The polyether significantly improves compatibility both cathode, attributed to electron‐withdrawing −CF 3 group generated LiF‐rich electrolyte/electrode interphase. Consequently, solid‐state Li||LiNi 0.6 Co 0.2 Mn O 2 employing FGPE demonstrate exceptional cycling performances 1000 cycles 78 % retention, representing one best results ever reported electrolytes. Moreover, enables operate at 4.7 V, realizing highest operating voltage date. Notably, our designed provides even practical conditions, including cathode loading (21 mg cm −2 ) industry‐level 18650‐type cylindrical cells (1.3 Ah, 500 cycles). This work insights into development oxidation‐stable electrolytes advancement LMBs.

Язык: Английский

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Synergetic regulation of SEI mechanics and crystallographic orientation for stable lithium metal pouch cells

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Май 25, 2024

The advancement of Li-metal batteries is significantly impeded by the presence unstable solid electrolyte interphase and Li dendrites upon cycling. Herein, we present an innovative approach to address these issues through synergetic regulation mechanics crystallography using yttrium fluoride/polymethyl methacrylate composite layer. Specifically, demonstrate in-situ generation Y-doped lithium metal reaction layer with metal, which reduces surface energy (200) plane, tunes preferential crystallographic orientation plane from conventional (110) during plating. These changes effectively passivate thereby reducing undesired side reactions between electrolytes 4 times. Meanwhile, suitable modulus (~1.02 GPa) can enhance mechanical stability maintain structural SEI. Consequently, a 4.2 Ah pouch cell high density 468 Wh kg

Язык: Английский

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Anode‐Free Alkali Metal Batteries: From Laboratory to Practicability

Advanced Functional Materials, Год журнала: 2024, Номер 34(44)

Опубликована: Май 19, 2024

Abstract Anode‐free alkali metal batteries (AFAMBs) are regarded as the most promising candidates for next‐generation high‐energy systems owing to their high safety, energy density, and low cost. However, restricted supply at cathode, severe dendrite growth, unstable electrode‐electrolyte interface result in Coulombic efficiency severely short cycle life. The optimization strategies mainly based on laboratory‐level coin cells, but effectiveness practical‐level is rarely discussed. This review presents a comprehensive overview of recent developments challenges AFAMBs from laboratory toward practicability. First, advances, major challenges, systematically summarized. More significantly, given vast differences battery structures operating conditions, gap between particularly emphasized this review. In addition, failure mechanisms have been outlined key parameters affecting performance identified. Finally, insightful perspectives practical presented, aiming provide helpful guidance subsequent basic research promote large‐scale commercial applications AFAMBs.

Язык: Английский

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Ultralong Cycling and Safe Lithium–Sulfur Pouch Cells for Sustainable Energy Storage

Advanced Materials, Год журнала: 2024, Номер 36(21)

Опубликована: Фев. 8, 2024

Abstract While layered metal oxides remain the dominant cathode materials for state‐of‐the‐art lithium‐ion batteries, conversion‐type cathodes such as sulfur present unique opportunities in developing cheaper, safer, and more energy‐dense next‐generation battery technologies. There has been remarkable progress advancing laboratory scale lithium–sulfur (Li–S) coin cells to a high level of performance. However, relevant strategies cannot be readily translated practical cell formats pouch even pack. Here these key technical challenges are addressed by molecular engineering Li hydrophobicization, fluorination thus favorable anode chemistry. The introduced tris(2,4‐di‐tert‐butylphenyl) phosphite (TBP) tetrabutylammonium fluoride (TBA + F − ) well cellulose membrane rolling enables formation functional thin layer that eliminates vulnerability towards already demanding environment required (1.55% relative humidity) production gives rise LiF‐rich solid electrolyte interphase (SEI) suppress dendrite growth. As result, Li–S assembled at pilot line survive 400 full charge/discharge cycles with an average Coulombic efficiency 99.55% impressive rate performance 1.5 C. A cell‐level energy density 417 Wh kg −1 power 2766 W also delivered via multilayer cell. pack can unmanned aerial vehicle 3 fairly long flight time. This work represents big step forward acceleration marketization future storage featuring improved safety, sustainability, higher reduced cost.

Язык: Английский

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Fluorine-Free Lithium Metal Batteries with a Stable LiF-Free Solid Electrolyte Interphase

ACS Energy Letters, Год журнала: 2024, Номер 9(4), С. 1389 - 1396

Опубликована: Март 5, 2024

Lithium fluoride (LiF), generated by the decomposition of in lithium metal batteries (LMBs), is considered an essential component for stabilizing metallic Li. However, substantial introduction fluorine raises potential environmental concerns. In this study, we designed a fluorine-free LMB integrating electrolyte and binder to construct B/O/N hybrid solid interphase (SEI) capable providing good stability fast Li+ transport ability. At test temperature 60 °C, LiF-free SEI can achieve highly reversible Li plating/stripping efficiency, with Coulombic efficiency 98.8% under conditions 3 mA cm–2 mAh cm–2. Furthermore, F-free battery exhibits rapid charging/discharging rate 100 C capacity exceeding 80 g–1 demonstrates stable cycling performance over 500 cycles at 50 C. The fast-charging capability was further verified practical Li–LiFePO4 full cells.

Язык: Английский

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Industry needs for practical lithium-metal battery designs in electric vehicles

Nature Energy, Год журнала: 2024, Номер 9(10), С. 1199 - 1205

Опубликована: Сен. 27, 2024

Язык: Английский

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Safety concerns in solid-state lithium batteries: from materials to devices

Energy & Environmental Science, Год журнала: 2024, Номер 17(20), С. 7543 - 7565

Опубликована: Янв. 1, 2024

The review focuses on potential safety issues in solid-state lithium batteries during electrolyte synthesis and battery operation/failure, proposes recent innovations future directions to inhibit thermal failure hazardous product release.

Язык: Английский

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