Conversion electrochemistry of copper selenides for robust and energetic aqueous batteries,Carbon Energy

当前位置： X-MOL 学术 › Carbon Energy › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Conversion electrochemistry of copper selenides for robust and energetic aqueous batteries
Carbon Energy ( IF 19.5 ) Pub Date : 2022-08-17 , DOI: 10.1002/cey2.261
Yichun Wang ₁ , Boya Wang ₂ , Jinshu Zhang ₁ , Dongliang Chao ₂ , Jiangfeng Ni ₁ , Liang Li ₁

Affiliation

The development of highly safe and low-cost aqueous batteries is of great significance in the background of carbon neutrality. However, the practical deployment of aqueous batteries has been plagued due to their relatively low capacity and poor cycling stability. Herein, we propose unique conversion electrochemistry of copper selenides for robust and energetic aqueous charge storage. In situ X-ray diffraction and operando Raman techniques reveal a reversible transformation from CuSe to Cu₂Se through the intermediates of Cu₃Se₂ and Cu_1.8Se. Such a conversion process activates the redox carrier of Cu²⁺ ion and delivers a remarkable rate capability of 285 mAh g⁻¹ at 20 A g⁻¹ and electrochemical durability up to 30,000 cycles. Furthermore, Cu²⁺ and H⁺ coinsertion chemistry is proposed to facilitate the conversion process. As a proof-of-concept, a hybrid aqueous pouch cell coupling CuSe//Zn is capable of affording maximum energy and power densities of 190 Wh kg^–1 and 1366 W kg⁻¹, respectively.

中文翻译：

硒化铜的转换电化学，用于坚固且高能的水性电池

开发高安全性和低成本的水系电池在碳中和背景下具有重要意义。然而，水系电池由于容量相对较低和循环稳定性较差，一直困扰着其实际应用。在此，我们提出了硒化铜的独特转化电化学，用于稳定和高能的水性电荷存储。原位 X 射线衍射和原位拉曼技术揭示了通过 Cu ₃ Se ₂和 Cu _1.8 Se中间体从 CuSe 到 Cu ₂ Se 的可逆转变。^{这种转化过程激活了 Cu 2+}离子的氧化还原载体，并在 20 A g 下提供了 285 mAh g ⁻¹的显着倍率能力^-1，电化学耐久性高达 30,000 次循环。此外，提出了Cu ²⁺和 H ^{+共插入化学以促进转化过程。}作为概念验证，耦合 CuSe//Zn 的混合水性软包电池能够提供分别为190 Wh kg ^–1和 1366 W kg ^{-1的最大能量和功率密度。}

更新日期：2022-08-17

点击分享查看原文

点击收藏

阅读更多本刊新发论文