Doubling the power efficiency of radioluminescent batteries via tuning the optical filed
Doubling the power efficiency of radioluminescent batteries via tuning the optical filed
Zhao, Prof. Yiying Zhao, Dr. Chen 1Li, Dr. Haibin 1Wu, Dr. Yuntao 2Liu, Miss Yinke 1Zhao, Dr. Yiying1
作者信息
- 1. China Academy of Engineering Physics;Sichuan Provincial Engineering Research Center of Deuterium-Tritium Fuel Cycle
- 2. Shanghai Institute of Ceramics Chinese Academy of Sciences
- 折叠
摘要
Radioluminescent (RL) batteries, offering exceptional energy density and extended operational lifetime, hold significant promise for applications in remote and extreme environments such as aerospace and deep-sea exploration. However, their widespread applications have been hindered by the low energy conversion efficiency, primarily stemming from the poor optical outcoupling. In this work, the overall power conversion efficiency of Cs₃Cu₂I₅: Tl-based X-ray RL batteries was more than doubled, from 0.92% to 2.15%, through systematic optical field engineering. A reflective film was applied on the top and side surfaces of the scintillator to minimize light losses. An optocoupler adhesive was adopted to realize refractive index matching between the scintillator and the photovoltaic cell, which not only shortens the light propagation path within the scintillator but also minimizes selfabsorption losses. As a result, the optical coupling efficiency was improved from 22.9% to 51.0%, leading to a 133.7% enhancement in overall device performance. The optimized battery achieves a power conversion efficiency of 2.15% and an output power density of 12.9 μW/cm². This study not only underscores the critical role of optical field management in advancing RL battery technology but also provides a strategic pathway for unlocking the full potential of RL batteries.
Abstract
Radioluminescent (RL) batteries, offering exceptional energy density and extended operational lifetime, hold significant promise for applications in remote and extreme environments such as aerospace and deep-sea exploration. However, their widespread applications have been hindered by the low energy conversion efficiency, primarily stemming from the poor optical outcoupling. In this work, the overall power conversion efficiency of CsCuI: Tl-based X-ray RL batteries was more than doubled, from 0.92% to 2.15%, through systematic optical field engineering. A reflective film was applied on the top and side surfaces of the scintillator to minimize light losses. An optocoupler adhesive was adopted to realize refractive index matching between the scintillator and the photovoltaic cell, which not only shortens the light propagation path within the scintillator but also minimizes selfabsorption losses. As a result, the optical coupling efficiency was improved from 22.9% to 51.0%, leading to a 133.7% enhancement in overall device performance. The optimized battery achieves a power conversion efficiency of 2.15% and an output power density of 12.9 W/cm. This study not only underscores the critical role of optical field management in advancing RL battery technology but also provides a strategic pathway for unlocking the full potential of RL batteries.关键词
Isotope battery/Radioluminescent battery/Scintillator/Outcoupling efficiency/Power conversion efficiency引用本文复制引用
Zhao, Prof. Yiying,Zhao, Dr. Chen,Li, Dr. Haibin,Wu, Dr. Yuntao,Liu, Miss Yinke,Zhao, Dr. Yiying.Doubling the power efficiency of radioluminescent batteries via tuning the optical filed[EB/OL].(2026-09-01)[2026-09-04].https://chinaxiv.org/abs/202609.00003.学科分类
TK0
