المؤلفون: Joseph Jegan Roy, Do Minh Phuong, Vivek Verma, Richa Chaudhary, Michael Carboni, Daniel Meyer, Bin Cao, Madhavi Srinivasan

المصدر: Carbon Energy, Vol 6, Iss 6, Pp n/a-n/a (2024)

مصطلحات موضوعية: battery design, cathode regeneration, direct recycling, graphite recycling, lithium‐ion battery, scaling‐up, Production of electric energy or power. Powerplants. Central stations, TK1001-1841

الوصف: Abstract Direct recycling is a novel approach to overcoming the drawbacks of conventional lithium‐ion battery (LIB) recycling processes and has gained considerable attention from the academic and industrial sectors in recent years. The primary objective of directly recycling LIBs is to efficiently recover and restore the active electrode materials and other components in the solid phase while retaining electrochemical performance. This technology's advantages over traditional pyrometallurgy and hydrometallurgy are cost‐effectiveness, energy efficiency, and sustainability, and it preserves the material structure and morphology and can shorten the overall recycling path. This review extensively discusses the advancements in the direct recycling of LIBs, including battery sorting, pretreatment processes, separation of cathode and anode materials, and regeneration and quality enhancement of electrode materials. It encompasses various approaches to successfully regenerate high‐value electrode materials and streamlining the recovery process without compromising their electrochemical properties. Furthermore, we highlight key challenges in direct recycling when scaled from lab to industries in four perspectives: (1) battery design, (2) disassembling, (3) electrode delamination, and (4) commercialization and sustainability. Based on these challenges and changing market trends, a few strategies are discussed to aid direct recycling efforts, such as binders, electrolyte selection, and alternative battery designs; and recent transitions and technological advancements in the battery industry are presented.

وصف الملف: electronic resource

Relation: https://doaj.org/toc/2637-9368

URL الوصول: https://doaj.org/article/69f6c95347af493697e6bb8a01c15783

المؤلفون: Du Yuan, Xin Li, Hong Yao, Yuhang Li, Xiaobo Zhu, Jin Zhao, Haitao Zhang, Yizhou Zhang, Ernest Tang Jun Jie, Yi Cai, Madhavi Srinivasan

المصدر: Advanced Science, Vol 10, Iss 8, Pp n/a-n/a (2023)

مصطلحات موضوعية: ionomer, liquid crystal electrolyte, ordering, zinc ion battery, Zn, Science

الوصف: Abstract Novel electrolyte is being pursued toward exploring Zn chemistry in zinc ion batteries. Here, a fluorine‐free liquid crystal (LC) ionomer‐type zinc electrolyte is presented, achieving simultaneous regulated water activity and long‐range ordering of conduction channels and SEI. Distinct from water network or local ordering in current advances, long‐range ordering of layered water channels is realized. Via manipulating water activity, conductivities range from ≈0.34 to 15 mS cm−1, and electrochemical window can be tuned from ≈2.3–4.3 V. The Zn|Zn symmetric cell with LC gel exhibits highly reversible Zn stripping/plating at 5 mA cm−2 and 5 mAh cm−2 for 800 h, with retained ordering of water channels. The capability of gel for inducing in situ formation of long‐range ordered layer SEI associated with alkylbenzene sulfonate anion is uncovered. V2O5/Zn cell with the gel shows much improved cycling stability comparing to conventional zinc electrolytes, where the preserved structure of V2O5 is associated with the efficiently stabilized Zn anode by the gel. Via long‐range ordering‐induced regulation on ion transport, electrochemical stability, and interfacial reaction, the development of LC electrolyte provides a pathway toward advancing aqueous rechargeable batteries.

وصف الملف: electronic resource

Relation: https://doaj.org/toc/2198-3844

URL الوصول: https://doaj.org/article/dc148898fed046058804a0251d46971b

المؤلفون: Du Yuan, Jin Zhao, William Manalastas, Jr., Sonal Kumar, Madhavi Srinivasan

المصدر: Nano Materials Science, Vol 2, Iss 3, Pp 248-263 (2020)

مصطلحات موضوعية: Aluminum ion battery, Aqueous aluminum ion battery, Rechargeable, Al stripping/plating, SEI, Technology, Engineering (General). Civil engineering (General), TA1-2040

الوصف: Aluminum ion battery (AIB) technology is an exciting alternative for post-lithium energy storage. AIBs based on ionic liquids have enabled advances in both cathode material development and fundamental understanding on mechanisms. Recently, unlocking chemistry in rechargeable aqueous aluminum ion battery (AAIB) provides impressive prospects in terms of kinetics, cost, safety considerations, and ease of operation. To review the progress on AAIB, we discuss the critical issues on aluminum electrochemistry in aqueous system, cathode material design to overcome the drawbacks by multivalent aluminum ions, and challenges on electrolyte design, aluminum stripping/plating, solid-electrolyte interface (SEI) formation, and design of cathode materials. This review aims to stimulate exploration of high-performance AAIB and rationalize feasibility grounded on underlying reaction mechanisms.

وصف الملف: electronic resource

Relation: http://www.sciencedirect.com/science/article/pii/S2589965119300741; https://doaj.org/toc/2589-9651

URL الوصول: https://doaj.org/article/8c161eb4d8f64952896a71e5d6ecc246

المؤلفون: Disha Gupta, Aravind Muthiah, Minh Phuong Do, Gopinathan Sankar, Timothy I. Hyde, Mark Patrick Copley, Tom Baikie, Yonghua Du, Shibo Xi, Madhavi Srinivasan, ZhiLi Dong

المصدر: ACS Omega, Vol 4, Iss 7, Pp 11338-11345 (2019)

مصطلحات موضوعية: Chemistry, QD1-999

وصف الملف: electronic resource

Relation: https://doaj.org/toc/2470-1343

URL الوصول: https://doaj.org/article/4f945adcad6545f9922a4626fc8f54cd

المؤلفون: Shaikshavali Petnikota, Rodney Chua, Yang Zhou, Eldho Edison, Madhavi Srinivasan

المصدر: Nanoscale Research Letters, Vol 13, Iss 1, Pp 1-13 (2018)

مصطلحات موضوعية: Amorphous vanadium oxide, PLD, Thin films, Cathode, Li- and Na-ion batteries, Materials of engineering and construction. Mechanics of materials, TA401-492

الوصف: Abstract Herein, we report additive- and binder-free pristine amorphous vanadium oxide (a-VOx) for Li- and Na-ion battery application. Thin films of a-VOx with a thickness of about 650 nm are grown onto stainless steel substrate from crystalline V2O5 target using pulsed laser deposition (PLD) technique. Under varying oxygen partial pressure (pO2) environment of 0, 6, 13 and 30 Pa, films bear O/V atomic ratios 0.76, 2.13, 2.25 and 2.0, respectively. The films deposited at 6‑30 Pa have a more atomic percentage of V5+ than that of V4+ with a tendency of later state increased as pO2 rises. Amorphous VOx films obtained at moderate pO2 levels are found superior to other counterparts for cathode application in Li- and Na-ion batteries with reversible capacities as high as 300 and 164 mAh g−1 at 0.1 C current rate, respectively. At the end of the 100th cycle, 90% capacity retention is noticed in both cases. The observed cycling trend suggests that more is the (V5+) stoichiometric nature of a-VOx better is the electrochemistry.

وصف الملف: electronic resource

Relation: http://link.springer.com/article/10.1186/s11671-018-2766-0; https://doaj.org/toc/1931-7573; https://doaj.org/toc/1556-276X

URL الوصول: https://doaj.org/article/861fb94ffb484971b55140d7ca6c83ac

المؤلفون: Nan Shen, Miriam Keppeler, Barbara Stiaszny, Holger Hain, Filippo Maglia, Madhavi Srinivasan

المصدر: Beilstein Journal of Nanotechnology, Vol 8, Iss 1, Pp 2032-2044 (2017)

مصطلحات موضوعية: 2,3-diaminobutane, 1,2-diaminopropane, ethylenediamine, lithium-ion battery, shape-controlled synthesis, Technology, Chemical technology, TP1-1185, Science, Physics, QC1-999

الوصف: α-Fe2O3 nanomaterials with an elongated nanorod morphology exhibiting superior electrochemical performance were obtained through hydrothermal synthesis assisted by diamine derivatives as shape-controlling agents (SCAs) for application as anodes in lithium-ion batteries (LIBs). The physicochemical characteristics were investigated via XRD and FESEM, revealing well-crystallized α-Fe2O3 with adjustable nanorod lengths between 240 and 400 nm and aspect ratios in the range from 2.6 to 5.7. The electrochemical performance was evaluated by cyclic voltammetry and charge–discharge measurements. A SCA test series, including ethylenediamine, 1,2-diaminopropane, 2,3-diaminobutane, and N-methylethylenediamine, was implemented in terms of the impact on the nanorod aspect ratio. Varied substituents on the vicinal diamine structure were examined towards an optimized reaction center in terms of electron density and steric hindrance. Possible interaction mechanisms of the diamine derivatives with ferric species and the correlation between the aspect ratio and electrochemical performance are discussed. Intermediate-sized α-Fe2O3 nanorods with length/aspect ratios of ≈240 nm/≈2.6 and ≈280 nm/≈3.0 were found to have excellent electrochemical characteristics with reversible discharge capacities of 1086 and 1072 mAh g−1 at 0.1 C after 50 cycles.

وصف الملف: electronic resource

Relation: https://doaj.org/toc/2190-4286

URL الوصول: https://doaj.org/article/981ed8fd09ba41ce97fe928edf62195d

المؤلفون: Dattakumar Mhamane, Anil Suryawanshi, Abhik Banerjee, Vanchiappan Aravindan, Satishchandra Ogale, Madhavi Srinivasan

المصدر: AIP Advances, Vol 3, Iss 4, Pp 042112-042112 (2013)

مصطلحات موضوعية: Physics, QC1-999

الوصف: In this paper we report the use of triethylene glycol reduced graphene oxide (TRGO) as an electrode material for non-aqueous energy storage devices such as supercapacitors and Li-ion batteries. TRGO based non–aqueous symmetric supercapacitor is constructed and shown to deliver maximum energy and power densities of 60.4 Wh kg–1 and 0.15 kW kg–1, respectively. More importantly, symmetric supercapacitor shows an extraordinary cycleability (5000 cycles) with over 80% of capacitance retention. In addition, Li-storage properties of TRGO are also evaluated in half-cell configuration (Li/TRGO) and shown to deliver a reversible capacity of ∼705 mAh g–1 with good cycleability at constant current density of 37 mA g–1. This result clearly suggests that green-synthesized graphene can be effectively used as a prospective electrode material for non-aqueous energy storage systems such as Li-ion batteries and supercapacitors.

وصف الملف: electronic resource

Relation: https://doaj.org/toc/2158-3226

URL الوصول: https://doaj.org/article/57152dc5b53f4e869f423938e2a30572

المؤلفون: Roy, Joseph Jegan, Cao, Bin, Madhavi, Srinivasan

المصدر: In Chemosphere November 2021 282

المؤلفون: Satish, Rohit, Lim, Kipil, Bucher, Nicolas, Hartung, Steffen, Aravindan, Vanchiappan, Franklin, Joseph, Lee, Jun-Sik, Toney, Michael F, Madhavi, Srinivasan

المصدر: Journal of Materials Chemistry A. 5(27)

مصطلحات موضوعية: Affordable and Clean Energy, Macromolecular and Materials Chemistry, Materials Engineering, Interdisciplinary Engineering

الوصف: Lithium rich layered materials are an interesting class of materials which exploit both anionic and cationic redox reactions to store energy upwards of 250 mA h g-1. This paper aims to understand the nature of the redox reactions taking place in these compounds. Li2RuO3 was used as the base compound, which is then compared with compounds generated by partially substituting Ru with Ti and Fe respectively. Electrochemical tests indicate that Fe substitution in the sample leads to an improvement in capacity, cycle life and reduction of potential decay. To elucidate the reason for this improvement in operando diffraction experiments were carried out, highlighting the formation of a secondary de-lithiated phase. The distortion of the pristine structure eventually induces frontier orbital reorganization leading to the oxygen redox reaction resulting in extra capacity. Local changes at Fe and Ru ions are recorded using in operando X-ray absorption spectroscopy (XAS). It was noted that while Ru undergoes a reversible redox reaction, Fe undergoes a significant irreversible change in its coordination environment during cycling. The changes in the coordination environment of oxygen and formation of O2n- type species were probed in situ using soft X-rays.

وصف الملف: application/pdf

URL الوصول: https://escholarship.org/uc/item/0qf5m5rg

المؤلفون: Zhan, Yi, Edison, Eldho, Manalastas, William, Tan, Ming Rui Joel, Satish, Rohit, Buffa, Andrea, Madhavi, Srinivasan, Mandler, Daniel

المصدر: In Electrochimica Acta 20 March 2020 337