Cano Francisco J, Imbuluzqueta Gorka, Yurrita Naiara, Aizpurua Jon, Hernández Juan M, Cambarau Werther, Zubillaga Oihana
TECNALIA, Basque Research and Technology Alliance (BRTA), Mikeletegi Pasealekua 2, 20009, Donostia-San Sebastian, Spain.
Heliyon. 2023 Sep 9;9(9):e20048. doi: 10.1016/j.heliyon.2023.e20048. eCollection 2023 Sep.
Encapsulation of photovoltaic cells was carried out using a transparent glass fiber reinforced composite with enhanced chemical recyclability based on a matrix of an epoxy resin containing cleavable functional groups. The current-voltage curves showed a decrease of 6.3% on the short-circuit current (Isc) after encapsulation of the cell, lower than the one observed for the reference non-recyclable standard epoxy composite. Its performance stability under thermal cycling, ultraviolet (UV), and damp-heat exposure was evaluated and compared with the one of the reference standard epoxy. Both resins showed good stability performance under UV exposure and thermal cycling accelerated aging. Moreover, a power loss below the 5% allowed by the photovoltaic standard was observed for the recyclable resin after 1000 h of damp-heat exposure, even the pronounced loss of 4.7% in power remains a concern. Regarding the recyclability, the composite was dissolved in acetic acid dissolution and glass fiber fabrics were successfully recovered. A new module was manufactured with these fabrics, showing this time a loss of 12% in Isc comparing with the non-encapsulated cell. Further work will consider improving the moisture barrier properties of the composite, and adjusting the recycling conditions to allow component recovery valid for new modules.
采用一种基于含可裂解官能团环氧树脂基体的具有增强化学可回收性的透明玻璃纤维增强复合材料对光伏电池进行封装。电流 - 电压曲线显示，电池封装后短路电流（Isc）下降了6.3%，低于参考不可回收标准环氧复合材料的下降幅度。评估了其在热循环、紫外线（UV）和湿热暴露下的性能稳定性，并与参考标准环氧树脂进行了比较。两种树脂在紫外线暴露和热循环加速老化下均表现出良好的稳定性。此外，可回收树脂在湿热暴露1000小时后，功率损失低于光伏标准允许的5%，尽管4.7%的明显功率损失仍令人担忧。关于可回收性，该复合材料溶解于乙酸中，成功回收了玻璃纤维织物。用这些织物制造了一个新模块，这次与未封装电池相比，短路电流损失了12%。进一步的工作将考虑改善复合材料的防潮性能，并调整回收条件以实现对新模块有效的组件回收。
