Rapid Fabrication of High-Safety Fiber Batteries via in-situ UV-Initiated Polymerization-Extrusion Method

Abstract

The construction of fiber lithium-ion batteries with gel polymer electrolytes offers promising potential for wearable electronics, yet their multi-step assembly and hour-scale polymerization significantly limit manufacturing efficiency. Here we report a rapid, continuous fabrication method for high-safety fiber batteries with gel electrolytes, achieving minute-scale construction with a tenfold manufacturing efficiency by incorporating fast ultraviolet (UV) light-initiated, in-situ polymerization within the extrusion of one-dimensional fiber electrodes. This in-situ UV-initiated polymerization-extrusion method affords a conformal electrode–electrolyte interface that simultaneously accommodates dynamic deformation and is compatible with varying active electrode materials. The resulting fiber batteries exhibit high cycling stability, with 78% capacity retention after 400 cycles, and sustained operation under 100,000 bending cycles, highlighting their potential for rapid fabrication and practical deployment of fiber batteries.

Graphical abstract

An integration of UV-initiated in-situ polymerization with one-dimensional fiber electrodes was constructed to enable the rapid fabrication of FLIBs incorporating gel polymer electrolytes. In contrast to conventional multi-step processes requiring hours, our UV-initiated polymerization-extrusion strategy enables rapid, within-minute fabrication.

Keywords

Fiber batteries / Gel polymer electrolytes / Rapid continuous fabrication / Light-initiated polymerization

References

[1] Zhu Y-H, Yang X-Y, Liu T, Zhang X-B. Flexible 1D batteries: Recent progress and prospects. Adv Mater, 2020, 32 1901961

[2] He JQ, Lu CH, Jiang HB, Han F, Shi X, Wu JX, Wang LY, Chen TQ, Wang JJ, Zhang Y, Yang H, Zhang GQ, Sun XM, Wang BJ, Chen PN, Wang YG, Xia YY, Peng HS. Scalable production of high-performing woven lithium-ion fibre batteries. Nature, 2021, 597 57

[3] Zou YQ, Liu Y, Li Y, Yang LY, Liu Y, He KD, Xiang YZ, Ouyang JY, Li P, Liang J, Zhou N, Zang HP, Ruan N, Li P, Xiao M, Lu X, Zheng RL, Hu LL, Tao GM. Magnetically actuated multimaterial fiberbot for precise minimally invasive knee laser surgery. Sci Adv, 2025, 11 eadt1809

[4] Chen GY, Yang ZW, Pan HY, Zhang J, Guo Y, Zhou ZY, Zheng JH, Zhang ZQ, Cao R, Hou K, Zhu MF. A review of hydrogel fiber: Design, synthesis, applications, and futures. Chem Rev, 2025, 125 5991

[5] Li CF, Zhang K, Li JX, Ye Q, Zhang KL, Wang BJ, Peng HS. Polymers for fiber batteries. Macromolecules, 2025, 58 1772

[6] Yuan YJ, Liu ZY, Zou XY, Fang PD, Zhang JL, Zhang QH, Zhang H, Yu QK, Zhou T, Li WZ, Zheng SJ, Yang MC, Sun Z, Zhu MF, Yan F. Flexible fibre-shaped fuel cells with gel-mediated internal pressure encapsulation. Nat Mater, 2025, 24 1608

[7] Li XS, Wang JC, Wang W, Zhang HT, Jiao YD, Tao SL, Wang YZ, Ye TT, Song J, Bai CY, Yin HT, Lu J, Li YR, Li FY, He E, Li QM, Zou KY, Wang HD, Cao XY, Wang XL, Zhang Y. A durable metalgel maintaining 3×10⁶ S∙M^‒1 conductivity under 1,000,000 stretching cycles. Adv Mater, 2025, 37 2420628

[8] Wang YZ, Jiao YD, Wang JC, Zhang HT, Ye TT, Lu J, He E, Li LH, Song J, Bai CY, Li XS, Li YR, Li FY, Li FQ, Jian JR, Yang S, Hou XX, Li QM, Zhao SP, Tan RY, Zhang Y. Metalgel fiber with excellent electrical and mechanical properties. ACS Appl Mater Interfaces, 2025, 17 8198

[9] Khudiyev T, Lee JT, Cox JR, Argentieri E, Loke G, Yuan R, Noel GH, Tatara R, Yu Y, Logan F, Joannopoulos J, Shao-Horn Y, Fink Y. 100 m long thermally drawn supercapacitor fibers with applications to 3D printing and textiles. Adv Mater, 2020, 32 2004971

[10] Li HY, Qu RX, Ma ZJ, Zhou NJ, Huang QY, Zheng ZJ. Permeable and patternable super-stretchable liquid metal fiber for constructing high-integration-density multifunctional electronic fibers. Adv Funct Mater, 2024, 34 2308120

[11] Wang C, Zhang YF, Liao M, Li PZ, Ma LM, Yao HX, Qu JH, Zhang K, Li CF, Song TB, Yang Z, Gong XC, Jiang HB, Tang CQ, Feng JY, Cheng XR, Jiang Y, Ye L, Li W, Chao DL, Peng HS, Wang BJ. A novel coating-extrusion method enabled, high energy, power density, and scalable production in monolithically integrated energy storage fibers. Adv Mater, 2025, 37 2417662

[12] Gong XC, Jiang HB, Lu CH, Zhang K, Long Y, Yang Z, Sun SQ, Chang YF, Ma LM, Peng HS, Wang BJ. Extending the calendar life of fiber lithium-ion batteries to 200 days with ultra-high barrier polymer tubes. Adv Mater, 2024, 36 2409910

[13] Liao M, Wang C, Hong Y, Zhang YF, Cheng XL, Sun H, Huang XL, Ye L, Wu JX, Shi X, Kang XY, Zhou XF, Wang JW, Li PZ, Sun XM, Chen PN, Wang BJ, Wang YG, Xia YY, Cheng YH, Peng HS. Industrial scale production of fibre batteries by a solution-extrusion method. Nat Nanotechnol, 2022, 17 372

[14] Cao RF, Chen K, Cui YF, Liu JW, Liu WQ, Huang G, Zhang XB. Gel electrolyte via in situ polymerization to promote durable lithium-air batteries. Chin Chem Lett, 2023, 34 108711

[15] Lu CH, Jiang HB, Cheng XR, He JQ, Long Y, Chang YF, Gong XC, Zhang K, Li JX, Zhu ZF, Wu JX, Wang JJ, Zheng YQ, Shi X, Ye L, Liao M, Sun XM, Wang BJ, Chen PN, Wang YG, Peng HS. High-performance fibre battery with polymer gel electrolyte. Nature, 2024, 629 86

[16] Lu CH, Cheng XT, Jiang HB, Cao YH, Qu JH, Zhang YT, Long Y, Gong XC, Yang Z, Zhang YA, Chen PN, Sun XM, Peng HS, Wang BJ. Ivy-inspired design of polymer gel electrolytes for fiber lithium-ion batteries with high stability. Adv Mater, 2025, 38 e13158

[17] Cheng XR, Lu CH, Gong XC, Li CF, Wang JF, Qu JH, Zhang YT, Song TB, Zhang YA, Jiang HB, Wang C, Long Y, Cao YH, Wang Y, Li W, Peng HS, Wang BJ. Quasi-solid fiber-shaped lithium-ion batteries with fire resistance. Angew Chem Int Ed Engl, 2025, 64 e202423419

[18] Chen M, Zhong MJ, Johnson JA. Light-controlled radical polymerization: Mechanisms, methods, and applications. Chem Rev, 2016, 116 10167

[19] Xue TT, Zhu CY, Yu DY, Zhang X, Lai FL, Zhang LS, Zhang C, Fan W, Liu TX. Fast and scalable production of crosslinked polyimide aerogel fibers for ultrathin thermoregulating clothes. Nat Commun, 2023, 14 8378

[20] Wang BW, Pan J, Zou XY, Zhao JL, Xu GD, Jin ZY, Sun Z, Yan F. UV-crosslinkable anthracene-based ionomer derived gas “Expressway” for anion exchange membrane fuel cells. J Mater Chem A, 2022, 10 13355

[21] Manthiram A, Yu XW, Wang SF. Lithium battery chemistries enabled by solid-state electrolytes. Nat Rev Mater, 2017, 2 16103

[22] Fan XY, Zhong C, Liu J, Ding J, Deng YD, Han XP, Zhang L, Hu WB, Wilkinson DP, Zhang JJ. Opportunities of flexible and portable electrochemical devices for energy storage: Expanding the spotlight onto semi-solid/solid electrolytes. Chem Rev, 2022, 122 17155

[23] Shaji I, Diddens D, Winter M, Nair JR. Mechanistically novel frontal-inspired in situ photopolymerization: An efficient electrode|electrolyte interface engineering method for high energy lithium metal polymer batteries. Energy Environ Mater, 2023, 6 e12469

[24] Kwon SH, Kim S, Park J, Lee MJ, Byun Y, Kim HJ, Baek YM, Kim J, Lee E, Lee SW, Kim BJ. In-situ photo-polymerized elastomeric composite electrolytes containing Li_6.4La₃Zr_1.4Ta_0.6O₁₂ particles for stable operation in lithium metal batteries. EcoMat, 2024, 6 e12503

[25] Xie C, Rong MM, Guo QY, Wei ZY, Chen ZJ, Huang QY, Zheng ZJ. UV-permeable 3D Li anodes for in situ fabrication of interface-gapless flexible solid-state lithium metal batteries. Adv Mater, 2024, 36 2406368

[26] Zeng SN, Pian SJ, Su MY, Wang ZN, Wu MQ, Liu XH, Chen MY, Xiang YZ, Wu JW, Zhang MN, Cen QQ, Tang YW, Zhou XH, Huang ZH, Wang R, Tunuhe A, Sun XY, Xia ZG, Tian MW, Chen M, Ma X, Yang LY, Zhou J, Zhou HM, Yang Q, Li X, Ma YG, Tao GM. Hierarchical-morphology metafabric for scalable passive daytime radiative cooling. Science, 2021, 373 692

[27] Bai TX, Xu CJ, Zheng JJ, Gao MY, Zhang XH, Zhu MF, Cheng YH. Closed-pore engineering in double-layer textiles for adaptive thermal and moisture management. Adv Mater, 2025, 37 e08473

[28] Su LX, Wu H, Zhang SK, Cui CX, Zhou SN, Pang H. Insight into intermediate behaviors and design strategies of platinum group metal-based alkaline hydrogen oxidation catalysts. Adv Mater, 2025, 37 2414628

[29] Su LX, Zhang SK, Tang JY, Sun HN, He B, Yang H, Zhu RM, Pang H. Balancing competitive intermediate behaviors on d-f hybridized Ni-MOF-derived catalysts for alkaline hydrogen oxidation reaction. Adv Funct Mater, 2026

Funding

National Natural Science Foundation of China(22475051)

Ministry of Science and Technology of the People's Republic of China(2022YFA1203002)

RIGHTS & PERMISSIONS

Donghua University, Shanghai, China

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