Title:	A sustainable δ-MnO₂ derived from Amazon rainforest Mn-ore tailings for applications in lithium-ion batteries.
Authors:	ANGELETTI, L. AGOSTINI, M. MIRANDA FIGUEIRA, B. A. LATINI, A. PARIS, E. C. De GIORGIO, F. SCHULTZ, T. Di CONZO, C. MURA, F. ROSSI, M. YADAV, N. G. ADELHELM, P. MAZZEI, F. BRUTTI, S. QUARANTA, S.
Affiliation:	UNIVERSITY OF ROME, P.LE ALDO MORO 5, 00185 ROME, ITALY SAPIENZA UNIVERSITY OF ROME, P.LE ALDO MORO 5, 00185 ROME, ITALY FEDERAL UNIVERSITY OF PARA SAPIENZA UNIVERSITY OF ROME, P.LE ALDO MORO 5, 00185 ROME, ITALY ELAINE CRISTINA PARIS, CNPDIA ITALIAN NATIONAL RESEARCH COUNCIL (ISMN–CNR) HAHN-MEITNER-PLATZ 1, 14109 BERLIN, GERMANY POLYTECHNIC OF TURIN, CORSO CASTELFIDARDO 39, TURIN, ITALY SAPIENZA UNIVERSITY OF ROME, VIA SCARPA 14, 00161 ROME, ITALY SAPIENZA UNIVERSITY OF ROME, VIA SCARPA 14, 00161 ROME, ITALY HUMBOLDT UNIVERSITY, 2.304, BROOK-TAYLOR-STR. 2, ADLERSHOF, 12489 BERLIN, GERMANY HAHN-MEITNER-PLATZ 1, 14109 BERLIN, GERMANY SAPIENZA UNIVERSITY OF ROME, P.LE ALDO MORO 5, 00185 ROME, ITALY SAPIENZA UNIVERSITY OF ROME, P.LE ALDO MORO 5, 00185 ROME, ITALY ITALIAN NATIONAL RESEARCH COUNCIL (ISMN–CNR), STRADA PROVINCIALE 35D 9, 00010 ROME, ITALY.
Date Issued:	2025
Citation:	Sustainable Materials and Technologies, v. 44, e01347, 2025.
Pages:	9 p.
Description:	The transition to net-zero emissions by 2050 necessitates the development of sustainable and efficient energy storage systems to complement the rise in renewable energy generation. Lithium-ion batteries (LiBs) are pivotal in this energy transformation, yet challenges remain in developing sustainable, high-performance materials. Manganese oxides (MnOₓ) are promising candidates for LiBs anodes due to their abundance and high theoretical capacity. However, the commercial synthesis of MnOₓ materials is resource-intensive, and the mining processes generate large amounts of environmentally hazardous tailings. In this study, we propose a novel method to recover manganese from mining tailings in the Brazilian Amazon and synthesize δ-MnO₂ as a high-capacity conversion anode material for LIBs. Using a green recovery method involving KOH and H₂O₂, we extracted potassium manganate (K₂MnO₄) from the tailings with a recovery efficiency of 90.3 %,and synthesized δ-MnO₂. The prepared material showed promising electrochemical properties, demonstrating its potential as a sustainable alternative to commercially available manganese oxides. This process not only offers a way to mitigate the environmental risks posed by manganese mining tailings but also provides an economically viable solution for producing high-performance battery materials. The developed methodology can be applied to other manganesebearing residues and low-grade ores, contributing to the growing demand for battery-grade manganese in a sustainable and circular manner.
Keywords:	Green recovery
ISSN:	2214-9937
DOI:	https://doi.org/10.1016/j.susmat.2025.e01347
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPDIA)