Electrolyte solvation structure manipulation enables safe and stable aqueous sodium ion batteries

2020 ◽  
Vol 8 (28) ◽  
pp. 14190-14197
Author(s):  
Huaisheng Ao ◽  
Chunyuan Chen ◽  
Zhiguo Hou ◽  
Wenlong Cai ◽  
Mengke Liu ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Organic Compounds ◽  
Aqueous Electrolyte ◽  
Interface Layer ◽  
Sodium Ion ◽  
Solid Electrolyte Interface ◽  
Side Reactions ◽  
Sodium Ion Batteries ◽  
Aqueous Sodium ◽  
Solvation Structure

A multi-component aqueous electrolyte with a composite solvent sheath can widen the voltage window to 2.8 V and inhibit side reactions. A solid electrolyte interface layer containing Na2CO3 and organic compounds suppresses the reaction of water with the discharged anode.

Characterization of a P2-type chelating-agent-assisted Na2/3Fe1/2Mn1/2O2 cathode material for sodium-ion batteries

RSC Advances ◽  
2014 ◽  
Vol 4 (43) ◽  
pp. 22798-22802 ◽  
Author(s):  
Kwangjin Park ◽  
Dongwook Han ◽  
Hyunjin Kim ◽  
Won-seok Chang ◽  
Byungjin Choi ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Cathode Material ◽  
Solid Electrolyte ◽  
Chelating Agent ◽  
Interface Layer ◽  
Sodium Ion ◽  
Solid Electrolyte Interface ◽  
Sodium Ion Batteries ◽  
Enhanced Electrochemical Performance

A chelating-agent-assisted Na2/3Fe1/2Mn1/2O2 material showed enhanced electrochemical performance due to the formation of a thin and stable solid-electrolyte interface layer.

Solid electrolyte interface stabilization via surface oxygen species functionalization in hard carbon for superior performance sodium-ion batteries

2020 ◽  
Vol 8 (7) ◽  
pp. 3606-3612 ◽  
Author(s):  
Hanjie Xie ◽  
Zhiliang Wu ◽  
Zhenyu Wang ◽  
Ning Qin ◽  
Yingzhi Li ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Sodium Ion ◽  
Solid Electrolyte Interface ◽  
Superior Performance ◽  
Sodium Ion Batteries ◽  
Oxygen Species ◽  
Surface Oxygen ◽  
Hard Carbon ◽  
Electrolyte Interface

The solid electrolyte interface could be stabilized via surface oxygen species functionalization in hard carbon for superior performance sodium-ion batteries.

scholarly journals Li + Pre‐Insertion Leads to Formation of Solid Electrolyte Interface on TiO 2 Nanotubes That Enables High‐Performance Anodes for Sodium Ion Batteries

2019 ◽  
Vol 10 (6) ◽  
pp. 1903448 ◽  
Author(s):  
Gihoon Cha ◽  
Shiva Mohajernia ◽  
Nhat Truong Nguyen ◽  
Anca Mazare ◽  
Nikita Denisov ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
High Performance ◽  
Sodium Ion ◽  
Solid Electrolyte Interface ◽  
Sodium Ion Batteries ◽  
Electrolyte Interface

Role of Electrolyte in Stabilizing the Solid Electrolyte Interface of Hard Carbon As an Anode for Sodium-Ion Batteries

2021 ◽  
Vol MA2021-01 (3) ◽  
pp. 236-236
Author(s):  
Hayley S Hirsh ◽  
Baharak Sayahpour ◽  
Ashley Shen ◽  
Weikang Li ◽  
Enyue Zhao ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Sodium Ion ◽  
Solid Electrolyte Interface ◽  
Sodium Ion Batteries ◽  
Hard Carbon ◽  
Electrolyte Interface

Capacity losses due to solid electrolyte interphase formation and sodium diffusion in sodium-ion batteries

2021 ◽  
Author(s):  
Le Anh Ma ◽  
Alexander Buckel ◽  
Leif Nyholm ◽  
Reza Younesi
Keyword(s):  
Carbon Black ◽  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
Open Circuit ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Electrochemical Testing ◽  
Capacity Loss ◽  
Sei Layer ◽  
Sodium Diffusion

Abstract Knowledge about capacity losses due to the formation and dissolution of the solid electrolyte interphase (SEI) layer in sodium-ion batteries (SIBs) is still limited. One major challenge in SIBs is the fact that the SEI generally contains more soluble species than the corresponding SEI layers formed in Li-ion batteries. By cycling carbon black electrodes against Na-metal electrodes, to mimic the SEI formation on negative SIB electrodes, this study studies the associated capacity losses in different carbonate electrolyte systems. Using electrochemical testing and synchrotron-based X-ray photoelectron (XPS) experiments, the capacity losses due to changes in the SEI layer and diffusion of sodium in the carbon black electrodes during open circuit pauses of 50 h, 30 h, 15 h and 5 h are investigated in nine different electrolyte systems. The different contributions to the open circuit capacity loss were determined using a new approach involving different galvanostatic cycling protocols. It is shown that the capacity loss depends on the interplay between the electrolyte chemistry and the thickness and stability of the SEI layer. The results show, that the Na-diffusion into the bulk electrode gives rise to a larger capacity loss than the SEI dissolution. Hence, Na-trapping effect is one of the major contribution in the observed capacity losses. Furthermore, the SEI formed in NaPF6-EC:DEC was found to become slightly thicker during 50 h pause, due to self-diffused deintercalation of Na from the carbon black structure coupled by further electrolyte reduction. On the other hand, the SEI in NaTFSI with the same solvent goes into dissolution during pause. The highest SEI dissolution rate and capacity loss was observed in NaPF6-EC:DEC (0.57 μAh/hpause) and the lowest in NaTFSI-EC:DME (0.15 μAh/hpause).

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