Fully Lithiated LixTiO2−δ Layer Coated Separator for Securing a Lithium-less Anode in an Ester-Based Electrolyte

Ester-based electrolytes, known for their cost-effectiveness and wide voltage windows, face compatibility challenges with lithium metal (Li0), leading to irreversible decomposition and dendrite growth, which impede their application in high-energy-density lithium metal batteri...

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التفاصيل البيبلوغرافية
المؤلف الرئيسي:	Baogang Zhao (19139738) (author)
مؤلفون آخرون:	Nuttapon Yodsin (6760856) (author), Haoyu Ma (12190828) (author), Phornphimon Maitarad (1417432) (author), Wanwisa Limphirat (5474471) (author), Zhuobin Han (21463654) (author), Yinghao Zhou (10106450) (author), Mengjia Yu (19139732) (author), Kexin Liu (1547230) (author), Bingqing Yan (8531742) (author), Xiaoyang Zhao (280499) (author), Guorong Chen (1805383) (author), Xin Feng (111466) (author), Rongrong Jia (2220763) (author), Liyi Shi (1366401) (author), Shuai Yuan (305841) (author), Yingying Lv (1645591) (author)
منشور في:	2025
الموضوعات:	Biochemistry Medicine Developmental Biology Plant Biology Chemical Sciences not elsewhere classified wide voltage windows solid electrolyte interface face compatibility challenges average coulombic efficiency electrochemical prelithiation strategy promoting uniform li fully lithiated li avg </ sub layer coated separator based electrolyte ester 0 </ sup x </ effective strategy coated polypropylene based electrolytes limited li li anodes work provides work develops sub >< side reaction oxygen vacancies nmc811 cathodes maintain 90 lmbs ). irreversible decomposition generation lmbs full cells free cu dendrite growth cycling stability contact area capacity retention areal capacity ></ sub 85 %. 60 cycles 40 μm 100 cycles
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الوصف
الملخص:	Ester-based electrolytes, known for their cost-effectiveness and wide voltage windows, face compatibility challenges with lithium metal (Li<sup>0</sup>), leading to irreversible decomposition and dendrite growth, which impede their application in high-energy-density lithium metal batteries (LMBs). This work develops an electrochemical prelithiation strategy to obtain a fully lithiated Li<sub><i>x</i></sub>TiO<sub>2−δ</sub> coated polypropylene (PP) separator with oxygen vacancies, preventing the depletion of limited Li<sup>0</sup> resources while promoting uniform Li<sup>0</sup> plating. Moreover, the dense closest packing structure of Li<sub><i>x</i></sub>TiO<sub>2−δ</sub> can reduce the contact area and side reaction between Li<sup>0</sup> and ester-based electrolytes, stabilizing the solid electrolyte interface (SEI) on Li<sup>0</sup>. Symmetric Li cells operating under 1.0 mA cm<sup>–2</sup> and 1.0 mA h cm<sup>–2</sup> demonstrate a long cycle life exceeding 5000 h. Full cells with NMC811 cathodes (4.3 mA h cm<sup>–2</sup> areal capacity) and Li anodes (40 μm, N/P ratio ≈ 1.9) maintain 90% capacity retention after 100 cycles with an average Coulombic efficiency (CE<sub>avg</sub>) exceeding 99.85%. The anode-free Cu\|NMC811 cells also show a CE<sub>avg</sub> of 98.36% after 60 cycles. This work provides a cost-effective strategy to enhance the safety, cycling stability, and energy density of next-generation LMBs.

Fully Lithiated Li<sub><i>x</i></sub>TiO<sub>2−δ</sub> Layer Coated Separator for Securing a Lithium-less Anode in an Ester-Based Electrolyte

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