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    Salinity power generation based biocompatible bacterial cellulose/MXene membrane for biological power source

    Year: 2022

    Journal: Nano Energy, Volume 102, NOV

    Authors: Wang, Baoxiu; Li, Jiahui; Wu, Zhuotong; Sheng, Nan; Zhang, Minghao; Han, Zhiliang; Jin, Mengtian; Li, Jing; Lv, Xiangguo; Ou, Kangkang; Wang, Huaping; Chen, Shiyan

    Organizations: National Natural Science Foundation of China [52073050, 52003048, 81800591]; China Postdoctoral Science Foundation [2021T140110]; Shanghai Sailing Program [18YF1412800]

    Keywords: Bacterial cellulose; MXene; Ion transport; Osmotic energy; Biocompatibility

    Powering implanted medical devices (IMDs) is still a challenge since the biological system requires biocom-patible, stable, and miniaturized electrical power sources. Making use of the salinity gradient is an attractive and efficient way to generate power. Here, we demonstrate the ion-channel-mimetic negatively charged bacterial cellulose (NBC)/MXene nanofluidic membrane as an osmotic nanopower generator. The introduction of NBC nanofibers into MXene nanosheets brings space charge and enhances ion flux. Considering the in vivo applica-tion, saline gelatin hydrogels are used as solid electrolytes for the first time. Benefiting from the combination of one-dimensional (1D) nanofibers and two-dimensional (2D) MXene sheets, a power density of 2.58 W m(-2) is obtained under a 100-fold concentration gradient of solid electrolyte. This work demonstrates that salinity en-ergy conversion can also be achieved using solid electrolytes. Moreover, the results of in vitro and in vivo evaluations demonstrate the good biocompatibility of the hybrid membranes. The high-performance osmotic energy conversion and good biocompatibility of the NBC/MXene membrane make it a promising tissue -integrated battery for powering implanted medical devices.
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