Shulou(Shulou.com)11/24 Report--

CTOnews.com November 22, the School of Physics of Lanzhou University recently updated the latest developments. Under the leadership of Professor Lan Wei, the flexible electronics research team has made new progress in the field of biodegradable energy systems.

Aiming at the special application scene of implantation in vivo, the flexible electronic research team all selected biodegradable materials, and obtained zinc ion hybrid supercapacitors with excellent electrochemical performance by constructing heterojunctions and making use of the ion limiting effect of gel electrolytes. it is used as the electric energy storage module of the biodegradable energy system.

In order to improve the continuous power supply ability of the system, the scientific research team integrates the wireless charging module and the power storage module to form an integrated flexible biodegradable energy supply system.

The system can completely conformal adhere to the three-dimensional surface of biological tissue without causing any mechanical damage to biological tissue.

The wireless power transmission device consists of a magnesium coil, which charges the device when the external transmitter coil is placed on the skin above the implant.

The energy absorbed by the coil under the skin passes through the circuit and then enters the energy storage module composed of mixed zinc ion supercapacitors (ionizers). As far as its characteristics are concerned, the ionizer is in the middle between a capacitor and a chemical power source, such as a battery. Although supercapacitors store less energy per unit volume than lithium batteries, they have a high power density, so they can provide large amounts of energy consistently.

MTT colorimetric method was used to evaluate the cytotoxicity of the materials used in the device. the results showed that the MoOx microtablets prepared by electrochemical oxidation and Alg-Na electrolytes had high biocompatibility.

After packaging, the device can work effectively for 30 days in a simulated body fluid environment (37 ℃, 0.1 mM PBS solution), and will be completely degraded after the task is completed. Six months after the device was implanted subcutaneously into the back of SD rats, it was completely absorbed by metabolism, during which no neutrophils and obvious inflammation were observed.

CTOnews.com attached the reference address of the paper: Hongwei Sheng et al.,A soft implantable energy supply system that integrates wireless charging and biodegradable Zn-ion hybrid supercapacitors.Sci. Adv.9,eadh8083 (2023) .DOI: 10.1126/sciadv.adh8083.

Lanzhou University Press release address: http://phy.lzu.edu.cn/info/1051/13242.htm.

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