First Exploration on Electrochemical Activation of Low‐Cost Albite Mineral for Boosting Lithium Storage Capability,Advanced Sustainable Systems

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First Exploration on Electrochemical Activation of Low‐Cost Albite Mineral for Boosting Lithium Storage Capability
Advanced Sustainable Systems ( IF 6.5 ) Pub Date : 2020-05-04 , DOI: 10.1002/adsu.202000057
Jun Mei ₁ , Tiantian Wang _{2,

3,

4} , Hong Peng ₅ , Godwin A. Ayoko ₁ , Jianjun Liu ₂ , Ting Liao ₃ , Ziqi Sun ₁

Affiliation

The direct use of natural minerals for low‐cost energy storage is a promising solution toward large‐scale and affordable sustainable energy supply, but it is usually impeded by their inert electrochemical activity. In this work, electrochemically inert albite mineral layered particles are activated as a promising low‐cost anode material for electrochemical Li⁺ ion storage devices through a facile thermal reduction treatment technology. Via this strategy, partial SiO₂ reduction within the albite mineral particles and a conductive carbon layer on the surface are simultaneously realized, which effectively addresses the issues of inactive lithium storage and poor electric conductivity of albite minerals. Via theoretical density functional theory calculations and molecular dynamics simulations, the activation mechanism of lithium storage achieved by silica reduction is understood. This innovatively activated albite mineral delivers a maximum specific capacity of >250 mAh g⁻¹ based on a dominant surface‐driven capacitive storage mechanism, and demonstrates excellent capacity and cycling stability at high charging/discharging rates. This design opens a new pathway to address the current cost issue in energy devices, provides insights into producing cost‐effective anodes by using silica‐rich minerals, and gives an alternative solution for improving the chemical reactivity of inorganic natural minerals toward low‐cost and large‐scale energy storages.

中文翻译：

低成本bitbit矿物电化学活化增强锂储存能力的初步探索

将天然矿物直接用于低成本储能是实现大规模且负担得起的可持续能源供应的有前途的解决方案，但通常由于其惰性的电化学活性而受到阻碍。在这项工作中，通过一种简便的热还原处理技术，将电化学惰性的钠长石矿物层状颗粒活化为电化学Li ⁺离子存储设备的有希望的低成本阳极材料。通过这种策略，部分SiO ₂同时实现钠长石矿物颗粒内的还原和表面上的导电碳层，这有效地解决了锂的惰性存储和钠长石矿物导电性差的问题。通过理论密度泛函理论计算和分子动力学模拟，了解了通过二氧化硅还原实现锂存储的活化机理。这种创新活化的钠长石矿物提供的最大比容量> 250 mAh g ^-1基于主导的表面驱动电容存储机制，并在高充电/放电速率下展示了出色的容量和循环稳定性。该设计为解决当前能源设备中的成本问题开辟了一条新途径，为使用富含二氧化硅的矿物生产具有成本效益的阳极提供了见识，并为提高无机天然矿物对低成本和低碳的化学反应性提供了替代解决方案。大型储能。

更新日期：2020-07-07

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