Here we present an innovative, universal, scalable, and straightforward strategy for cultivating a resilient, flexible lithium-ion battery (LIB) based on the bacterial-based self-growing approach. The electrodes and separator layers are integrated intrinsically into one unity of sandwich bacterial cellulose integrated film (SBCIF), with various active material combinations and tailored mechanical properties. The flexible LIB thereof showcases prominent deformation tolerance and multistage foldability due to the unique self-generated wavy-like structure. The LTO|LFP (Li₄Ti₅O₁₂ and LiFePO₄) SBCIF-based flexible LIB demonstrates reliable long-term electrochemical stability with high flexibility, by exhibiting a high capacity retention (>95%) after 500 cycles at 1C/1C after experiencing a 10 000 bending/flattening treatment. The LTO|LFP SBCIF battery subjected to a simultaneous bending/flattening and cycling experiment shows an extraordinary capacity retention rate (>68%) after 200 cycles at 1C/1C. The biobased self-growing approach offers an exciting and promising pathway toward the tailored, integrated high-performance flexible LIBs.

中文翻译：

---

用于定制、集成高性能柔性锂离子电池的生物基自生长方法

在这里，我们提出了一种创新、通用、可扩展且直接的策略，用于基于基于细菌的自生长方法培养有弹性、灵活的锂离子电池 (LIB)。电极和隔膜层本质上集成到一个整体的夹心细菌纤维素集成膜 (SBCIF) 中，具有各种活性材料组合和定制的机械性能。由于其独特的自生波浪状结构，其柔性 LIB 展示了突出的变形容限和多级折叠性。LTO|LFP（Li ₄ Ti ₅ O ₁₂和LiFePO ₄) 基于 SBCIF 的柔性 LIB 在经历 10 000 次弯曲/压扁处理后，在 1C/1C 下 500 次循环后表现出高容量保持率 (>95%)，表现出可靠的长期电化学稳定性和高灵活性。LTO|LFP SBCIF 电池同时进行了弯曲/压扁和循环实验，在 1C/1C 下循环 200 次后显示出非凡的容量保持率 (>68%)。基于生物的自生长方法为定制、集成的高性能柔性 LIBs 提供了一条令人兴奋和有前途的途径。