scholarly journals Nanosized and metastable molybdenum oxides as negative electrode materials for durable high-energy aqueous Li-ion batteries

2021 ◽  
Vol 118 (48) ◽  
pp. e2024969118
Author(s):  
Jeongsik Yun ◽  
Ryota Sagehashi ◽  
Yoshihiko Sato ◽  
Takuya Masuda ◽  
Satoshi Hoshino ◽  
...  
Keyword(s):  
Energy Density ◽  
Electrode Material ◽  
Electrode Materials ◽  
Aqueous Electrolyte ◽  
Negative Electrode ◽  
High Energy ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Negative Electrode Material ◽  
Negative Electrode Materials

The development of inherently safe energy devices is a key challenge, and aqueous Li-ion batteries draw large attention for this purpose. Due to the narrow electrochemical stable potential window of aqueous electrolytes, the energy density and the selection of negative electrode materials are significantly limited. For achieving durable and high-energy aqueous Li-ion batteries, the development of negative electrode materials exhibiting a large capacity and low potential without triggering decomposition of water is crucial. Herein, a type of a negative electrode material (i.e., LixNb2/7Mo3/7O2) is proposed for high-energy aqueous Li-ion batteries. LixNb2/7Mo3/7O2 delivers a large capacity of ∼170 mA ⋅ h ⋅ g−1 with a low operating potential range of 1.9 to 2.8 versus Li/Li+ in 21 m lithium bis(trifluoromethanesulfonyl)amide (LiTFSA) aqueous electrolyte. A full cell consisting of Li1.05Mn1.95O4/Li9/7Nb2/7Mo3/7O2 presents high energy density of 107 W ⋅ h ⋅ kg−1 as the maximum value in 21 m LiTFSA aqueous electrolyte, and 73% in capacity retention is achieved after 2,000 cycles. Furthermore, hard X-ray photoelectron spectroscopy study reveals that a protective surface layer is formed at the surface of the negative electrode, by which the high-energy and durable aqueous batteries are realized with LixNb2/7Mo3/7O2. This work combines a high capacity with a safe negative electrode material through delivering the Mo-based oxide with unique nanosized and metastable characters.

scholarly journals Current Li-Ion Battery Technologies in Electric Vehicles and Opportunities for Advancements

Energies ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 1074 ◽  
Author(s):  
Yu Miao ◽  
Patrick Hynan ◽  
Annette von Jouanne ◽  
Alexandre Yokochi
Keyword(s):  
Electric Vehicles ◽  
Electrode Materials ◽  
Negative Electrode ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
Li Ion Batteries ◽  
Li Ion Battery ◽  
Li Ion ◽  
On The Road

Over the past several decades, the number of electric vehicles (EVs) has continued to increase. Projections estimate that worldwide, more than 125 million EVs will be on the road by 2030. At the heart of these advanced vehicles is the lithium-ion (Li-ion) battery which provides the required energy storage. This paper presents and compares key components of Li-ion batteries and describes associated battery management systems, as well as approaches to improve the overall battery efficiency, capacity, and lifespan. Material and thermal characteristics are identified as critical to battery performance. The positive and negative electrode materials, electrolytes and the physical implementation of Li-ion batteries are discussed. In addition, current research on novel high energy density batteries is presented, as well as opportunities to repurpose and recycle the batteries.

Li9Al4Sn5as a new ordered superstructure of the Li13Sn5type

2017 ◽  
Vol 73 (4) ◽  
pp. 337-342 ◽  
Author(s):  
Volodymyr Pavlyuk ◽  
Grygoriy Dmytriv ◽  
Ivan Tarasiuk ◽  
Helmut Ehrenberg
Keyword(s):  
Electrode Materials ◽  
Tight Binding ◽  
Negative Electrode ◽  
Structure Type ◽  
Binary Compound ◽  
Li Ion Batteries ◽  
Compound A ◽  
Li Ion ◽  
Rhombic Dodecahedra ◽  
Negative Electrode Materials

Alloys from the ternary Li–Al–Sn system have been investigated with respect to possible applications as negative electrode materials in Li-ion batteries. This led to the discovery of a new ternary compound, a superstructure of the Li13Sn5binary compound. The ternary stannide, Li9Al4Sn5(nonalithium tetraaluminium pentastannide; trigonal,P\overline{3}m1,hP18), crystallizes as a new structure type, which is an ordered variant of the binary Li13Sn5structure type. One Li and one Sn site have \overline{3}m. symmetry, and all other atoms occupy sites of 3m. symmetry. The polyhedra around all types of atoms are rhombic dodecahedra. The electronic structure was calculated by the tight-binding linear muffin-tin orbital atomic spheres approximation method. The electron concentration is higher around the Sn and Al atoms, which form an [Al4Sn5]m−polyanion.

TiO2(B)/Anatase Composites Synthesized by Spray Drying as High Performance Negative Electrode Material in Li-Ion Batteries

ChemSusChem ◽  
2013 ◽  
Vol 6 (8) ◽  
pp. 1312-1315 ◽  
Author(s):  
Edgar Ventosa ◽  
Bastian Mei ◽  
Wei Xia ◽  
Martin Muhler ◽  
Wolfgang Schuhmann
Keyword(s):  
Spray Drying ◽  
Electrode Material ◽  
High Performance ◽  
Negative Electrode ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Negative Electrode Material
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